From faf9e908f14b849f82e8ba9d90c2886287415329 Mon Sep 17 00:00:00 2001
From: Richard DeMarco <richard.demarco@xero.com>
Date: Fri, 1 Dec 2023 15:51:45 -0700
Subject: [PATCH] generates xero-python 1.26.0 from OAS 2.40.1

---
 docs/v1/accounting/index.html                 |   2 +-
 docs/v1/appstore/index.html                   |   2 +-
 docs/v1/assets/index.html                     |   2 +-
 docs/v1/files/index.html                      |   2 +-
 docs/v1/finance/index.html                    |   2 +-
 docs/v1/payroll-au/index.html                 |   2 +-
 docs/v1/payroll-nz/index.html                 |   2 +-
 docs/v1/payroll-uk/index.html                 |   2 +-
 docs/v1/projects/index.html                   |   2 +-
 setup.py                                      |   2 +-
 xero_python/__init__.py                       |   2 +-
 xero_python/accounting/api/accounting_api.py  | 764 ++++++++++++++++-
 xero_python/accounting/docs/AccountingApi.md  | 792 +++++++++++++-----
 xero_python/accounting/docs/Allocation.md     |   2 +
 xero_python/accounting/docs/Contact.md        |   1 -
 .../accounting/docs/TenNinetyNineContact.md   |   3 +
 xero_python/accounting/models/account_type.py |   4 -
 xero_python/accounting/models/allocation.py   |  58 ++
 xero_python/accounting/models/contact.py      |  29 -
 xero_python/accounting/models/tax_type.py     |  24 +
 .../models/ten_ninety_nine_contact.py         | 105 +++
 xero_python/appstore/api/app_store_api.py     |  12 +-
 xero_python/appstore/docs/AppStoreApi.md      |  12 +-
 xero_python/assets/api/asset_api.py           |  12 +-
 xero_python/assets/docs/AssetApi.md           |  12 +-
 xero_python/docs/README.md                    |   4 +-
 xero_python/file/api/files_api.py             |  66 +-
 xero_python/file/docs/FilesApi.md             |  48 +-
 xero_python/finance/api/finance_api.py        |   2 +-
 xero_python/finance/models/problem_type.py    |   1 +
 xero_python/identity/api/identity_api.py      |   2 +-
 xero_python/payrollau/api/payroll_au_api.py   |  77 +-
 xero_python/payrollau/docs/PayrollAuApi.md    |  90 +-
 .../payrollau/models/leave_period_status.py   |   2 +
 xero_python/payrollnz/api/payroll_nz_api.py   | 147 +++-
 xero_python/payrollnz/docs/PayrollNZApi.md    | 174 ++--
 xero_python/payrolluk/api/payroll_uk_api.py   | 137 ++-
 xero_python/payrolluk/docs/PayrollUkApi.md    | 162 ++--
 xero_python/project/api/project_api.py        |  37 +-
 xero_python/project/docs/ProjectApi.md        |  42 +-
 40 files changed, 2410 insertions(+), 433 deletions(-)

diff --git a/docs/v1/accounting/index.html b/docs/v1/accounting/index.html
index f02fc636..a5e978f0 100644
--- a/docs/v1/accounting/index.html
+++ b/docs/v1/accounting/index.html
@@ -6008,7 +6008,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Accounting"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="Accounting"><a href="#api-Accounting">Methods</a></li>
               <li data-group="Accounting" data-name="createAccount" class="">
                 <a href="#api-Accounting-createAccount">createAccount</a>
diff --git a/docs/v1/appstore/index.html b/docs/v1/appstore/index.html
index 54ea0326..2a6f08ba 100644
--- a/docs/v1/appstore/index.html
+++ b/docs/v1/appstore/index.html
@@ -1133,7 +1133,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="AppStore"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="AppStore"><a href="#api-AppStore">Methods</a></li>
               <li data-group="AppStore" data-name="getSubscription" class="">
                 <a href="#api-AppStore-getSubscription">getSubscription</a>
diff --git a/docs/v1/assets/index.html b/docs/v1/assets/index.html
index 5fdf9c78..d294c15f 100644
--- a/docs/v1/assets/index.html
+++ b/docs/v1/assets/index.html
@@ -1392,7 +1392,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Asset"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="Asset"><a href="#api-Asset">Methods</a></li>
               <li data-group="Asset" data-name="createAsset" class="">
                 <a href="#api-Asset-createAsset">createAsset</a>
diff --git a/docs/v1/files/index.html b/docs/v1/files/index.html
index 01a5065b..8c6675a7 100644
--- a/docs/v1/files/index.html
+++ b/docs/v1/files/index.html
@@ -1155,7 +1155,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Files"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Files"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="Files"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="Files"><a href="#api-Files">Methods</a></li>
               <li data-group="Files" data-name="createFileAssociation" class="">
                 <a href="#api-Files-createFileAssociation">createFileAssociation</a>
diff --git a/docs/v1/finance/index.html b/docs/v1/finance/index.html
index b771ae59..dfd9f5b5 100644
--- a/docs/v1/finance/index.html
+++ b/docs/v1/finance/index.html
@@ -2706,7 +2706,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Finance"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="Finance"><a href="#api-Finance">Methods</a></li>
               <li data-group="Finance" data-name="getAccountingActivityAccountUsage" class="">
                 <a href="#api-Finance-getAccountingActivityAccountUsage">getAccountingActivityAccountUsage</a>
diff --git a/docs/v1/payroll-au/index.html b/docs/v1/payroll-au/index.html
index 1f5d1499..f43563fd 100644
--- a/docs/v1/payroll-au/index.html
+++ b/docs/v1/payroll-au/index.html
@@ -3254,7 +3254,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollAu"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="PayrollAu"><a href="#api-PayrollAu">Methods</a></li>
               <li data-group="PayrollAu" data-name="createEmployee" class="">
                 <a href="#api-PayrollAu-createEmployee">createEmployee</a>
diff --git a/docs/v1/payroll-nz/index.html b/docs/v1/payroll-nz/index.html
index 427acba2..ba51f327 100644
--- a/docs/v1/payroll-nz/index.html
+++ b/docs/v1/payroll-nz/index.html
@@ -3838,7 +3838,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollNz"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="PayrollNz"><a href="#api-PayrollNz">Methods</a></li>
               <li data-group="PayrollNz" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollNz-approveTimesheet">approveTimesheet</a>
diff --git a/docs/v1/payroll-uk/index.html b/docs/v1/payroll-uk/index.html
index 7d50840b..04060011 100644
--- a/docs/v1/payroll-uk/index.html
+++ b/docs/v1/payroll-uk/index.html
@@ -3510,7 +3510,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollUk"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="PayrollUk"><a href="#api-PayrollUk">Methods</a></li>
               <li data-group="PayrollUk" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollUk-approveTimesheet">approveTimesheet</a>
diff --git a/docs/v1/projects/index.html b/docs/v1/projects/index.html
index 3473ed9d..06930d04 100644
--- a/docs/v1/projects/index.html
+++ b/docs/v1/projects/index.html
@@ -1468,7 +1468,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Project"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Project"><strong>VSN: </strong>1.25.0</li>
+              <li class="nav-header" data-group="Project"><strong>VSN: </strong>1.26.0</li>
               <li class="nav-header" data-group="Project"><a href="#api-Project">Methods</a></li>
               <li data-group="Project" data-name="createProject" class="">
                 <a href="#api-Project-createProject">createProject</a>
diff --git a/setup.py b/setup.py
index 0e630248..14ff0b5a 100644
--- a/setup.py
+++ b/setup.py
@@ -48,5 +48,5 @@ def read_file(filename):
     keywords="xero python sdk API oAuth",
     name="xero_python",
     packages=find_packages(include=["xero_python", "xero_python.*"]),
-    version="1.25.0",
+    version="1.26.0",
 )
diff --git a/xero_python/__init__.py b/xero_python/__init__.py
index 092c1523..775f17f3 100644
--- a/xero_python/__init__.py
+++ b/xero_python/__init__.py
@@ -2,4 +2,4 @@
 
 __author__ = """Xero Developer API"""
 __email__ = "api@xero.com"
-__version__ = "1.25.0"
+__version__ = "1.26.0"
diff --git a/xero_python/accounting/api/accounting_api.py b/xero_python/accounting/api/accounting_api.py
index fc4c9469..c9649ecb 100644
--- a/xero_python/accounting/api/accounting_api.py
+++ b/xero_python/accounting/api/accounting_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def create_account(
         self,
         xero_tenant_id,
         account,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -68,6 +69,7 @@ def create_account(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Account account: Account object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -96,6 +98,9 @@ def create_account(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -141,6 +146,7 @@ def create_account_attachment_by_file_name(
         account_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -151,6 +157,7 @@ def create_account_attachment_by_file_name(
         :param str account_id: Unique identifier for Account object (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -194,6 +201,9 @@ def create_account_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -241,6 +251,7 @@ def create_bank_transaction_attachment_by_file_name(
         bank_transaction_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -251,6 +262,7 @@ def create_bank_transaction_attachment_by_file_name(
         :param str bank_transaction_id: Xero generated unique identifier for a bank transaction (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -294,6 +306,9 @@ def create_bank_transaction_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -342,6 +357,7 @@ def create_bank_transaction_history_record(
         xero_tenant_id,
         bank_transaction_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -351,6 +367,7 @@ def create_bank_transaction_history_record(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str bank_transaction_id: Xero generated unique identifier for a bank transaction (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -387,6 +404,9 @@ def create_bank_transaction_history_record(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -432,6 +452,7 @@ def create_bank_transactions(
         self,
         xero_tenant_id,
         bank_transactions,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -442,6 +463,7 @@ def create_bank_transactions(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param BankTransactions bank_transactions: BankTransactions with an array of BankTransaction objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -478,6 +500,9 @@ def create_bank_transactions(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -521,6 +546,7 @@ def create_bank_transfer(
         self,
         xero_tenant_id,
         bank_transfers,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -529,6 +555,7 @@ def create_bank_transfer(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param BankTransfers bank_transfers: BankTransfers with array of BankTransfer objects in request body (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -557,6 +584,9 @@ def create_bank_transfer(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -602,6 +632,7 @@ def create_bank_transfer_attachment_by_file_name(
         bank_transfer_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -612,6 +643,7 @@ def create_bank_transfer_attachment_by_file_name(
         :param str bank_transfer_id: Xero generated unique identifier for a bank transfer (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -655,6 +687,9 @@ def create_bank_transfer_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -703,6 +738,7 @@ def create_bank_transfer_history_record(
         xero_tenant_id,
         bank_transfer_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -712,6 +748,7 @@ def create_bank_transfer_history_record(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str bank_transfer_id: Xero generated unique identifier for a bank transfer (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -748,6 +785,9 @@ def create_bank_transfer_history_record(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -794,6 +834,7 @@ def create_batch_payment(
         xero_tenant_id,
         batch_payments,
         summarize_errors=empty,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -803,6 +844,7 @@ def create_batch_payment(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param BatchPayments batch_payments: BatchPayments with an array of Payments in body of request (required)
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -834,6 +876,9 @@ def create_batch_payment(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -878,6 +923,7 @@ def create_batch_payment_history_record(
         xero_tenant_id,
         batch_payment_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -887,6 +933,7 @@ def create_batch_payment_history_record(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str batch_payment_id: Unique identifier for BatchPayment (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -923,6 +970,9 @@ def create_batch_payment_history_record(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -969,6 +1019,7 @@ def create_branding_theme_payment_services(
         xero_tenant_id,
         branding_theme_id,
         payment_services,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -978,6 +1029,7 @@ def create_branding_theme_payment_services(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str branding_theme_id: Unique identifier for a Branding Theme (required)
         :param PaymentServices payment_services: PaymentServices array with PaymentService object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1014,6 +1066,9 @@ def create_branding_theme_payment_services(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1061,6 +1116,7 @@ def create_contact_attachment_by_file_name(
         contact_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1071,6 +1127,7 @@ def create_contact_attachment_by_file_name(
         :param str contact_id: Unique identifier for a Contact (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1114,6 +1171,9 @@ def create_contact_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1159,6 +1219,7 @@ def create_contact_group(
         self,
         xero_tenant_id,
         contact_groups,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1167,6 +1228,7 @@ def create_contact_group(
         OAuth2 scope: accounting.contacts
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param ContactGroups contact_groups: ContactGroups with an array of names in request body (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1195,6 +1257,9 @@ def create_contact_group(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1239,6 +1304,7 @@ def create_contact_group_contacts(
         xero_tenant_id,
         contact_group_id,
         contacts,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1248,6 +1314,7 @@ def create_contact_group_contacts(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str contact_group_id: Unique identifier for a Contact Group (required)
         :param Contacts contacts: Contacts with array of contacts specifying the ContactID to be added to ContactGroup in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1284,6 +1351,9 @@ def create_contact_group_contacts(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1330,6 +1400,7 @@ def create_contact_history(
         xero_tenant_id,
         contact_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1339,6 +1410,7 @@ def create_contact_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str contact_id: Unique identifier for a Contact (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1375,6 +1447,9 @@ def create_contact_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1418,6 +1493,7 @@ def create_contacts(
         self,
         xero_tenant_id,
         contacts,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1427,6 +1503,7 @@ def create_contacts(
         OAuth2 scope: accounting.contacts
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Contacts contacts: Contacts with an array of Contact objects to create in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -1459,6 +1536,9 @@ def create_contacts(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1503,6 +1583,7 @@ def create_credit_note_allocation(
         xero_tenant_id,
         credit_note_id,
         allocations,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1513,6 +1594,7 @@ def create_credit_note_allocation(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str credit_note_id: Unique identifier for a Credit Note (required)
         :param Allocations allocations: Allocations with array of Allocation object in body of request. (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -1553,6 +1635,9 @@ def create_credit_note_allocation(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1600,6 +1685,7 @@ def create_credit_note_attachment_by_file_name(
         credit_note_id,
         file_name,
         body,
+        idempotency_key=empty,
         include_online=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1611,6 +1697,7 @@ def create_credit_note_attachment_by_file_name(
         :param str credit_note_id: Unique identifier for a Credit Note (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool include_online: Allows an attachment to be seen by the end customer within their online invoice
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -1658,6 +1745,9 @@ def create_credit_note_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1706,6 +1796,7 @@ def create_credit_note_history(
         xero_tenant_id,
         credit_note_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1715,6 +1806,7 @@ def create_credit_note_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str credit_note_id: Unique identifier for a Credit Note (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1751,6 +1843,9 @@ def create_credit_note_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1794,6 +1889,7 @@ def create_credit_notes(
         self,
         xero_tenant_id,
         credit_notes,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -1804,6 +1900,7 @@ def create_credit_notes(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param CreditNotes credit_notes: Credit Notes with array of CreditNote object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -1840,6 +1937,9 @@ def create_credit_notes(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1883,6 +1983,7 @@ def create_currency(
         self,
         xero_tenant_id,
         currency,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1891,6 +1992,7 @@ def create_currency(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Currency currency: Currency object in the body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1919,6 +2021,9 @@ def create_currency(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1962,6 +2067,7 @@ def create_employees(
         self,
         xero_tenant_id,
         employees,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1971,6 +2077,7 @@ def create_employees(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Employees employees: Employees with array of Employee object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2003,6 +2110,9 @@ def create_employees(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2047,6 +2157,7 @@ def create_expense_claim_history(
         xero_tenant_id,
         expense_claim_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2056,6 +2167,7 @@ def create_expense_claim_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str expense_claim_id: Unique identifier for a ExpenseClaim (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2092,6 +2204,9 @@ def create_expense_claim_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2137,6 +2252,7 @@ def create_expense_claims(
         self,
         xero_tenant_id,
         expense_claims,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2145,6 +2261,7 @@ def create_expense_claims(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param ExpenseClaims expense_claims: ExpenseClaims with array of ExpenseClaim object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2173,6 +2290,9 @@ def create_expense_claims(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2218,6 +2338,7 @@ def create_invoice_attachment_by_file_name(
         invoice_id,
         file_name,
         body,
+        idempotency_key=empty,
         include_online=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2229,6 +2350,7 @@ def create_invoice_attachment_by_file_name(
         :param str invoice_id: Unique identifier for an Invoice (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool include_online: Allows an attachment to be seen by the end customer within their online invoice
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2276,6 +2398,9 @@ def create_invoice_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2322,6 +2447,7 @@ def create_invoice_history(
         xero_tenant_id,
         invoice_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2331,6 +2457,7 @@ def create_invoice_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str invoice_id: Unique identifier for an Invoice (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2367,6 +2494,9 @@ def create_invoice_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2410,6 +2540,7 @@ def create_invoices(
         self,
         xero_tenant_id,
         invoices,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -2420,6 +2551,7 @@ def create_invoices(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Invoices invoices: Invoices with an array of invoice objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -2456,6 +2588,9 @@ def create_invoices(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2500,6 +2635,7 @@ def create_item_history(
         xero_tenant_id,
         item_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2509,6 +2645,7 @@ def create_item_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str item_id: Unique identifier for an Item (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2545,6 +2682,9 @@ def create_item_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2588,6 +2728,7 @@ def create_items(
         self,
         xero_tenant_id,
         items,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -2598,6 +2739,7 @@ def create_items(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Items items: Items with an array of Item objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -2633,6 +2775,9 @@ def create_items(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2676,6 +2821,7 @@ def create_linked_transaction(
         self,
         xero_tenant_id,
         linked_transaction,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2684,6 +2830,7 @@ def create_linked_transaction(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param LinkedTransaction linked_transaction: LinkedTransaction object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2712,6 +2859,9 @@ def create_linked_transaction(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2757,6 +2907,7 @@ def create_manual_journal_attachment_by_file_name(
         manual_journal_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2767,6 +2918,7 @@ def create_manual_journal_attachment_by_file_name(
         :param str manual_journal_id: Unique identifier for a ManualJournal (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2810,6 +2962,9 @@ def create_manual_journal_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2858,6 +3013,7 @@ def create_manual_journal_history_record(
         xero_tenant_id,
         manual_journal_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2867,6 +3023,7 @@ def create_manual_journal_history_record(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str manual_journal_id: Unique identifier for a ManualJournal (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2903,6 +3060,9 @@ def create_manual_journal_history_record(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2948,6 +3108,7 @@ def create_manual_journals(
         self,
         xero_tenant_id,
         manual_journals,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2957,6 +3118,7 @@ def create_manual_journals(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param ManualJournals manual_journals: ManualJournals array with ManualJournal object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2989,6 +3151,9 @@ def create_manual_journals(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3033,6 +3198,7 @@ def create_overpayment_allocations(
         xero_tenant_id,
         overpayment_id,
         allocations,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -3043,6 +3209,7 @@ def create_overpayment_allocations(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str overpayment_id: Unique identifier for a Overpayment (required)
         :param Allocations allocations: Allocations array with Allocation object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -3083,6 +3250,9 @@ def create_overpayment_allocations(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3129,6 +3299,7 @@ def create_overpayment_history(
         xero_tenant_id,
         overpayment_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3138,6 +3309,7 @@ def create_overpayment_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str overpayment_id: Unique identifier for a Overpayment (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3174,6 +3346,9 @@ def create_overpayment_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3217,6 +3392,7 @@ def create_payment(
         self,
         xero_tenant_id,
         payment,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3225,6 +3401,7 @@ def create_payment(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Payment payment: Request body with a single Payment object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3253,6 +3430,9 @@ def create_payment(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3297,6 +3477,7 @@ def create_payment_history(
         xero_tenant_id,
         payment_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3306,6 +3487,7 @@ def create_payment_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str payment_id: Unique identifier for a Payment (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3342,6 +3524,9 @@ def create_payment_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3385,6 +3570,7 @@ def create_payment_service(
         self,
         xero_tenant_id,
         payment_services,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3393,6 +3579,7 @@ def create_payment_service(
         OAuth2 scope: paymentservices
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PaymentServices payment_services: PaymentServices array with PaymentService object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3421,6 +3608,9 @@ def create_payment_service(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3464,6 +3654,7 @@ def create_payments(
         self,
         xero_tenant_id,
         payments,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -3473,6 +3664,7 @@ def create_payments(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Payments payments: Payments array with Payment object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -3505,6 +3697,9 @@ def create_payments(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3549,6 +3744,7 @@ def create_prepayment_allocations(
         xero_tenant_id,
         prepayment_id,
         allocations,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -3559,6 +3755,7 @@ def create_prepayment_allocations(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str prepayment_id: Unique identifier for a PrePayment (required)
         :param Allocations allocations: Allocations with an array of Allocation object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -3599,6 +3796,9 @@ def create_prepayment_allocations(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3645,6 +3845,7 @@ def create_prepayment_history(
         xero_tenant_id,
         prepayment_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3654,6 +3855,7 @@ def create_prepayment_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str prepayment_id: Unique identifier for a PrePayment (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3690,6 +3892,9 @@ def create_prepayment_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3735,6 +3940,7 @@ def create_purchase_order_attachment_by_file_name(
         purchase_order_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3745,6 +3951,7 @@ def create_purchase_order_attachment_by_file_name(
         :param str purchase_order_id: Unique identifier for an Purchase Order (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3788,6 +3995,9 @@ def create_purchase_order_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3836,6 +4046,7 @@ def create_purchase_order_history(
         xero_tenant_id,
         purchase_order_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -3845,6 +4056,7 @@ def create_purchase_order_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str purchase_order_id: Unique identifier for an Purchase Order (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -3881,6 +4093,9 @@ def create_purchase_order_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -3926,6 +4141,7 @@ def create_purchase_orders(
         self,
         xero_tenant_id,
         purchase_orders,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -3935,6 +4151,7 @@ def create_purchase_orders(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PurchaseOrders purchase_orders: PurchaseOrders with an array of PurchaseOrder object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -3967,6 +4184,9 @@ def create_purchase_orders(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4012,6 +4232,7 @@ def create_quote_attachment_by_file_name(
         quote_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4022,6 +4243,7 @@ def create_quote_attachment_by_file_name(
         :param str quote_id: Unique identifier for an Quote (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4065,6 +4287,9 @@ def create_quote_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4111,6 +4336,7 @@ def create_quote_history(
         xero_tenant_id,
         quote_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4120,6 +4346,7 @@ def create_quote_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str quote_id: Unique identifier for an Quote (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4156,6 +4383,9 @@ def create_quote_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4199,6 +4429,7 @@ def create_quotes(
         self,
         xero_tenant_id,
         quotes,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -4208,6 +4439,7 @@ def create_quotes(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Quotes quotes: Quotes with an array of Quote object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -4240,6 +4472,9 @@ def create_quotes(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4283,6 +4518,7 @@ def create_receipt(
         self,
         xero_tenant_id,
         receipts,
+        idempotency_key=empty,
         unitdp=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -4292,6 +4528,7 @@ def create_receipt(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Receipts receipts: Receipts with an array of Receipt object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -4324,6 +4561,9 @@ def create_receipt(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4369,6 +4609,7 @@ def create_receipt_attachment_by_file_name(
         receipt_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4379,6 +4620,7 @@ def create_receipt_attachment_by_file_name(
         :param str receipt_id: Unique identifier for a Receipt (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4422,6 +4664,9 @@ def create_receipt_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4468,6 +4713,7 @@ def create_receipt_history(
         xero_tenant_id,
         receipt_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4477,6 +4723,7 @@ def create_receipt_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str receipt_id: Unique identifier for a Receipt (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4513,6 +4760,9 @@ def create_receipt_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4558,6 +4808,7 @@ def create_repeating_invoice_attachment_by_file_name(
         repeating_invoice_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4568,6 +4819,7 @@ def create_repeating_invoice_attachment_by_file_name(
         :param str repeating_invoice_id: Unique identifier for a Repeating Invoice (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4611,6 +4863,9 @@ def create_repeating_invoice_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4659,6 +4914,7 @@ def create_repeating_invoice_history(
         xero_tenant_id,
         repeating_invoice_id,
         history_records,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4668,6 +4924,7 @@ def create_repeating_invoice_history(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str repeating_invoice_id: Unique identifier for a Repeating Invoice (required)
         :param HistoryRecords history_records: HistoryRecords containing an array of HistoryRecord objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4704,6 +4961,9 @@ def create_repeating_invoice_history(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4749,6 +5009,7 @@ def create_repeating_invoices(
         self,
         xero_tenant_id,
         repeating_invoices,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -4758,6 +5019,7 @@ def create_repeating_invoices(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param RepeatingInvoices repeating_invoices: RepeatingInvoices with an array of repeating invoice objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -4790,6 +5052,9 @@ def create_repeating_invoices(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4833,6 +5098,7 @@ def create_tax_rates(
         self,
         xero_tenant_id,
         tax_rates,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4841,6 +5107,7 @@ def create_tax_rates(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param TaxRates tax_rates: TaxRates array with TaxRate object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4869,6 +5136,9 @@ def create_tax_rates(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4912,6 +5182,7 @@ def create_tracking_category(
         self,
         xero_tenant_id,
         tracking_category,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4920,6 +5191,7 @@ def create_tracking_category(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param TrackingCategory tracking_category: TrackingCategory object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4948,6 +5220,9 @@ def create_tracking_category(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4992,6 +5267,7 @@ def create_tracking_options(
         xero_tenant_id,
         tracking_category_id,
         tracking_option,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5001,6 +5277,7 @@ def create_tracking_options(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str tracking_category_id: Unique identifier for a TrackingCategory (required)
         :param TrackingOption tracking_option: TrackingOption object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5037,6 +5314,9 @@ def create_tracking_options(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5156,6 +5436,7 @@ def delete_batch_payment(
         self,
         xero_tenant_id,
         batch_payment_delete,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5164,6 +5445,7 @@ def delete_batch_payment(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param BatchPaymentDelete batch_payment_delete: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5192,6 +5474,9 @@ def delete_batch_payment(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5236,6 +5521,7 @@ def delete_batch_payment_by_url_param(
         xero_tenant_id,
         batch_payment_id,
         batch_payment_delete_by_url_param,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5245,6 +5531,7 @@ def delete_batch_payment_by_url_param(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str batch_payment_id: Unique identifier for BatchPayment (required)
         :param BatchPaymentDeleteByUrlParam batch_payment_delete_by_url_param: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5281,6 +5568,9 @@ def delete_batch_payment_by_url_param(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5484,6 +5774,95 @@ def delete_contact_group_contacts(
                 error, self, "delete_contact_group_contacts"
             )
 
+    def delete_credit_note_allocations(
+        self,
+        xero_tenant_id,
+        credit_note_id,
+        allocation_id,
+        _return_http_data_only=True,
+        _preload_content=True,
+        _request_timeout=None,
+    ):
+        """Deletes an Allocation from a Credit Note  # noqa: E501
+        OAuth2 scope: accounting.transactions
+        :param str xero_tenant_id: Xero identifier for Tenant (required)
+        :param str credit_note_id: Unique identifier for a Credit Note (required)
+        :param str allocation_id: Unique identifier for Allocation object (required)
+        :param bool _return_http_data_only: return received data only
+        :param bool _preload_content: load received data in models
+        :param bool _request_timeout: maximum wait time for response
+        :return: Allocation
+        """
+
+        # verify the required parameter 'xero_tenant_id' is set
+        if xero_tenant_id is None:
+            raise ValueError(
+                "Missing the required parameter `xero_tenant_id` "
+                "when calling `delete_credit_note_allocations`"
+            )
+        # verify the required parameter 'credit_note_id' is set
+        if credit_note_id is None:
+            raise ValueError(
+                "Missing the required parameter `credit_note_id` "
+                "when calling `delete_credit_note_allocations`"
+            )
+        # verify the required parameter 'allocation_id' is set
+        if allocation_id is None:
+            raise ValueError(
+                "Missing the required parameter `allocation_id` "
+                "when calling `delete_credit_note_allocations`"
+            )
+
+        collection_formats = {}
+        path_params = {
+            "CreditNoteID": credit_note_id,
+            "AllocationID": allocation_id,
+        }
+
+        query_params = []
+
+        header_params = {
+            "xero-tenant-id": xero_tenant_id,
+        }
+
+        local_var_files = {}
+        form_params = []
+
+        body_params = None
+        # HTTP header `Accept`
+        header_params["Accept"] = self.api_client.select_header_accept(
+            ["application/json"]
+        )
+
+        # Authentication setting
+        auth_settings = ["OAuth2"]
+        url = self.get_resource_url(
+            "/CreditNotes/{CreditNoteID}/Allocations/{AllocationID}"
+        )
+
+        try:
+            return self.api_client.call_api(
+                url,
+                "DELETE",
+                path_params,
+                query_params,
+                header_params,
+                body=body_params,
+                post_params=form_params,
+                files=local_var_files,
+                response_type="Allocation",
+                response_model_finder=self.get_model_finder(),
+                auth_settings=auth_settings,
+                _return_http_data_only=_return_http_data_only,
+                _preload_content=_preload_content,
+                _request_timeout=_request_timeout,
+                collection_formats=collection_formats,
+            )
+        except exceptions.HTTPStatusException as error:
+            raise translate_status_exception(
+                error, self, "delete_credit_note_allocations"
+            )
+
     def delete_item(
         self,
         xero_tenant_id,
@@ -5635,11 +6014,101 @@ def delete_linked_transaction(
         except exceptions.HTTPStatusException as error:
             raise translate_status_exception(error, self, "delete_linked_transaction")
 
+    def delete_overpayment_allocations(
+        self,
+        xero_tenant_id,
+        overpayment_id,
+        allocation_id,
+        _return_http_data_only=True,
+        _preload_content=True,
+        _request_timeout=None,
+    ):
+        """Deletes an Allocation from an overpayment  # noqa: E501
+        OAuth2 scope: accounting.transactions
+        :param str xero_tenant_id: Xero identifier for Tenant (required)
+        :param str overpayment_id: Unique identifier for a Overpayment (required)
+        :param str allocation_id: Unique identifier for Allocation object (required)
+        :param bool _return_http_data_only: return received data only
+        :param bool _preload_content: load received data in models
+        :param bool _request_timeout: maximum wait time for response
+        :return: Allocation
+        """
+
+        # verify the required parameter 'xero_tenant_id' is set
+        if xero_tenant_id is None:
+            raise ValueError(
+                "Missing the required parameter `xero_tenant_id` "
+                "when calling `delete_overpayment_allocations`"
+            )
+        # verify the required parameter 'overpayment_id' is set
+        if overpayment_id is None:
+            raise ValueError(
+                "Missing the required parameter `overpayment_id` "
+                "when calling `delete_overpayment_allocations`"
+            )
+        # verify the required parameter 'allocation_id' is set
+        if allocation_id is None:
+            raise ValueError(
+                "Missing the required parameter `allocation_id` "
+                "when calling `delete_overpayment_allocations`"
+            )
+
+        collection_formats = {}
+        path_params = {
+            "OverpaymentID": overpayment_id,
+            "AllocationID": allocation_id,
+        }
+
+        query_params = []
+
+        header_params = {
+            "xero-tenant-id": xero_tenant_id,
+        }
+
+        local_var_files = {}
+        form_params = []
+
+        body_params = None
+        # HTTP header `Accept`
+        header_params["Accept"] = self.api_client.select_header_accept(
+            ["application/json"]
+        )
+
+        # Authentication setting
+        auth_settings = ["OAuth2"]
+        url = self.get_resource_url(
+            "/Overpayments/{OverpaymentID}/Allocations/{AllocationID}"
+        )
+
+        try:
+            return self.api_client.call_api(
+                url,
+                "DELETE",
+                path_params,
+                query_params,
+                header_params,
+                body=body_params,
+                post_params=form_params,
+                files=local_var_files,
+                response_type="Allocation",
+                response_model_finder=self.get_model_finder(),
+                auth_settings=auth_settings,
+                _return_http_data_only=_return_http_data_only,
+                _preload_content=_preload_content,
+                _request_timeout=_request_timeout,
+                collection_formats=collection_formats,
+            )
+        except exceptions.HTTPStatusException as error:
+            raise translate_status_exception(
+                error, self, "delete_overpayment_allocations"
+            )
+
     def delete_payment(
         self,
         xero_tenant_id,
         payment_id,
         payment_delete,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5649,6 +6118,7 @@ def delete_payment(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str payment_id: Unique identifier for a Payment (required)
         :param PaymentDelete payment_delete: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5685,6 +6155,9 @@ def delete_payment(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5724,6 +6197,95 @@ def delete_payment(
         except exceptions.HTTPStatusException as error:
             raise translate_status_exception(error, self, "delete_payment")
 
+    def delete_prepayment_allocations(
+        self,
+        xero_tenant_id,
+        prepayment_id,
+        allocation_id,
+        _return_http_data_only=True,
+        _preload_content=True,
+        _request_timeout=None,
+    ):
+        """Deletes an Allocation from a Prepayment  # noqa: E501
+        OAuth2 scope: accounting.transactions
+        :param str xero_tenant_id: Xero identifier for Tenant (required)
+        :param str prepayment_id: Unique identifier for a PrePayment (required)
+        :param str allocation_id: Unique identifier for Allocation object (required)
+        :param bool _return_http_data_only: return received data only
+        :param bool _preload_content: load received data in models
+        :param bool _request_timeout: maximum wait time for response
+        :return: Allocation
+        """
+
+        # verify the required parameter 'xero_tenant_id' is set
+        if xero_tenant_id is None:
+            raise ValueError(
+                "Missing the required parameter `xero_tenant_id` "
+                "when calling `delete_prepayment_allocations`"
+            )
+        # verify the required parameter 'prepayment_id' is set
+        if prepayment_id is None:
+            raise ValueError(
+                "Missing the required parameter `prepayment_id` "
+                "when calling `delete_prepayment_allocations`"
+            )
+        # verify the required parameter 'allocation_id' is set
+        if allocation_id is None:
+            raise ValueError(
+                "Missing the required parameter `allocation_id` "
+                "when calling `delete_prepayment_allocations`"
+            )
+
+        collection_formats = {}
+        path_params = {
+            "PrepaymentID": prepayment_id,
+            "AllocationID": allocation_id,
+        }
+
+        query_params = []
+
+        header_params = {
+            "xero-tenant-id": xero_tenant_id,
+        }
+
+        local_var_files = {}
+        form_params = []
+
+        body_params = None
+        # HTTP header `Accept`
+        header_params["Accept"] = self.api_client.select_header_accept(
+            ["application/json"]
+        )
+
+        # Authentication setting
+        auth_settings = ["OAuth2"]
+        url = self.get_resource_url(
+            "/Prepayments/{PrepaymentID}/Allocations/{AllocationID}"
+        )
+
+        try:
+            return self.api_client.call_api(
+                url,
+                "DELETE",
+                path_params,
+                query_params,
+                header_params,
+                body=body_params,
+                post_params=form_params,
+                files=local_var_files,
+                response_type="Allocation",
+                response_model_finder=self.get_model_finder(),
+                auth_settings=auth_settings,
+                _return_http_data_only=_return_http_data_only,
+                _preload_content=_preload_content,
+                _request_timeout=_request_timeout,
+                collection_formats=collection_formats,
+            )
+        except exceptions.HTTPStatusException as error:
+            raise translate_status_exception(
+                error, self, "delete_prepayment_allocations"
+            )
+
     def delete_tracking_category(
         self,
         xero_tenant_id,
@@ -5892,6 +6454,7 @@ def email_invoice(
         xero_tenant_id,
         invoice_id,
         request_empty,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5901,6 +6464,7 @@ def email_invoice(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str invoice_id: Unique identifier for an Invoice (required)
         :param RequestEmpty request_empty: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5937,6 +6501,9 @@ def email_invoice(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -16505,6 +17072,7 @@ def post_setup(
         self,
         xero_tenant_id,
         setup,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -16513,6 +17081,7 @@ def post_setup(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Setup setup: Object including an accounts array, a conversion balances array and a conversion date object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -16540,6 +17109,9 @@ def post_setup(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -16584,6 +17156,7 @@ def update_account(
         xero_tenant_id,
         account_id,
         accounts,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -16593,6 +17166,7 @@ def update_account(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str account_id: Unique identifier for Account object (required)
         :param Accounts accounts: Request of type Accounts array with one Account (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -16629,6 +17203,9 @@ def update_account(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -16674,6 +17251,7 @@ def update_account_attachment_by_file_name(
         account_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -16684,6 +17262,7 @@ def update_account_attachment_by_file_name(
         :param str account_id: Unique identifier for Account object (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -16727,6 +17306,9 @@ def update_account_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -16773,6 +17355,7 @@ def update_bank_transaction(
         xero_tenant_id,
         bank_transaction_id,
         bank_transactions,
+        idempotency_key=empty,
         unitdp=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -16783,6 +17366,7 @@ def update_bank_transaction(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str bank_transaction_id: Xero generated unique identifier for a bank transaction (required)
         :param BankTransactions bank_transactions: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -16823,6 +17407,9 @@ def update_bank_transaction(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -16868,6 +17455,7 @@ def update_bank_transaction_attachment_by_file_name(
         bank_transaction_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -16878,6 +17466,7 @@ def update_bank_transaction_attachment_by_file_name(
         :param str bank_transaction_id: Xero generated unique identifier for a bank transaction (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -16921,6 +17510,9 @@ def update_bank_transaction_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -16970,6 +17562,7 @@ def update_bank_transfer_attachment_by_file_name(
         bank_transfer_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -16980,6 +17573,7 @@ def update_bank_transfer_attachment_by_file_name(
         :param str bank_transfer_id: Xero generated unique identifier for a bank transfer (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17023,6 +17617,9 @@ def update_bank_transfer_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17071,6 +17668,7 @@ def update_contact(
         xero_tenant_id,
         contact_id,
         contacts,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17080,6 +17678,7 @@ def update_contact(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str contact_id: Unique identifier for a Contact (required)
         :param Contacts contacts: an array of Contacts containing single Contact object with properties to update (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17116,6 +17715,9 @@ def update_contact(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17161,6 +17763,7 @@ def update_contact_attachment_by_file_name(
         contact_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17171,6 +17774,7 @@ def update_contact_attachment_by_file_name(
         :param str contact_id: Unique identifier for a Contact (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17214,6 +17818,9 @@ def update_contact_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17260,6 +17867,7 @@ def update_contact_group(
         xero_tenant_id,
         contact_group_id,
         contact_groups,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17269,6 +17877,7 @@ def update_contact_group(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str contact_group_id: Unique identifier for a Contact Group (required)
         :param ContactGroups contact_groups: an array of Contact groups with Name of specific group to update (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17305,6 +17914,9 @@ def update_contact_group(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17349,6 +17961,7 @@ def update_credit_note(
         xero_tenant_id,
         credit_note_id,
         credit_notes,
+        idempotency_key=empty,
         unitdp=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -17359,6 +17972,7 @@ def update_credit_note(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str credit_note_id: Unique identifier for a Credit Note (required)
         :param CreditNotes credit_notes: an array of Credit Notes containing credit note details to update (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -17399,6 +18013,9 @@ def update_credit_note(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17444,6 +18061,7 @@ def update_credit_note_attachment_by_file_name(
         credit_note_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17454,6 +18072,7 @@ def update_credit_note_attachment_by_file_name(
         :param str credit_note_id: Unique identifier for a Credit Note (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17497,6 +18116,9 @@ def update_credit_note_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17545,6 +18167,7 @@ def update_expense_claim(
         xero_tenant_id,
         expense_claim_id,
         expense_claims,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17554,6 +18177,7 @@ def update_expense_claim(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str expense_claim_id: Unique identifier for a ExpenseClaim (required)
         :param ExpenseClaims expense_claims: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17590,6 +18214,9 @@ def update_expense_claim(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17634,6 +18261,7 @@ def update_invoice(
         xero_tenant_id,
         invoice_id,
         invoices,
+        idempotency_key=empty,
         unitdp=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -17644,6 +18272,7 @@ def update_invoice(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str invoice_id: Unique identifier for an Invoice (required)
         :param Invoices invoices: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -17684,6 +18313,9 @@ def update_invoice(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17729,6 +18361,7 @@ def update_invoice_attachment_by_file_name(
         invoice_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17739,6 +18372,7 @@ def update_invoice_attachment_by_file_name(
         :param str invoice_id: Unique identifier for an Invoice (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17782,6 +18416,9 @@ def update_invoice_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17828,6 +18465,7 @@ def update_item(
         xero_tenant_id,
         item_id,
         items,
+        idempotency_key=empty,
         unitdp=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -17838,6 +18476,7 @@ def update_item(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str item_id: Unique identifier for an Item (required)
         :param Items items: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -17876,6 +18515,9 @@ def update_item(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -17920,6 +18562,7 @@ def update_linked_transaction(
         xero_tenant_id,
         linked_transaction_id,
         linked_transactions,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -17929,6 +18572,7 @@ def update_linked_transaction(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str linked_transaction_id: Unique identifier for a LinkedTransaction (required)
         :param LinkedTransactions linked_transactions: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -17965,6 +18609,9 @@ def update_linked_transaction(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18009,6 +18656,7 @@ def update_manual_journal(
         xero_tenant_id,
         manual_journal_id,
         manual_journals,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -18018,6 +18666,7 @@ def update_manual_journal(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str manual_journal_id: Unique identifier for a ManualJournal (required)
         :param ManualJournals manual_journals: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -18054,6 +18703,9 @@ def update_manual_journal(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18099,6 +18751,7 @@ def update_manual_journal_attachment_by_file_name(
         manual_journal_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -18109,6 +18762,7 @@ def update_manual_journal_attachment_by_file_name(
         :param str manual_journal_id: Unique identifier for a ManualJournal (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -18152,6 +18806,9 @@ def update_manual_journal_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18199,6 +18856,7 @@ def update_or_create_bank_transactions(
         self,
         xero_tenant_id,
         bank_transactions,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -18209,6 +18867,7 @@ def update_or_create_bank_transactions(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param BankTransactions bank_transactions: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -18245,6 +18904,9 @@ def update_or_create_bank_transactions(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18290,6 +18952,7 @@ def update_or_create_contacts(
         self,
         xero_tenant_id,
         contacts,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -18299,6 +18962,7 @@ def update_or_create_contacts(
         OAuth2 scope: accounting.contacts
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Contacts contacts: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -18331,6 +18995,9 @@ def update_or_create_contacts(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18374,6 +19041,7 @@ def update_or_create_credit_notes(
         self,
         xero_tenant_id,
         credit_notes,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -18384,6 +19052,7 @@ def update_or_create_credit_notes(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param CreditNotes credit_notes: an array of Credit Notes with a single CreditNote object. (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -18420,6 +19089,9 @@ def update_or_create_credit_notes(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18465,6 +19137,7 @@ def update_or_create_employees(
         self,
         xero_tenant_id,
         employees,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -18474,6 +19147,7 @@ def update_or_create_employees(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Employees employees: Employees with array of Employee object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -18506,6 +19180,9 @@ def update_or_create_employees(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18549,6 +19226,7 @@ def update_or_create_invoices(
         self,
         xero_tenant_id,
         invoices,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -18559,6 +19237,7 @@ def update_or_create_invoices(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Invoices invoices: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -18595,6 +19274,9 @@ def update_or_create_invoices(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18638,6 +19320,7 @@ def update_or_create_items(
         self,
         xero_tenant_id,
         items,
+        idempotency_key=empty,
         summarize_errors=empty,
         unitdp=empty,
         _return_http_data_only=True,
@@ -18648,6 +19331,7 @@ def update_or_create_items(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Items items: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
@@ -18684,6 +19368,9 @@ def update_or_create_items(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18727,6 +19414,7 @@ def update_or_create_manual_journals(
         self,
         xero_tenant_id,
         manual_journals,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -18736,6 +19424,7 @@ def update_or_create_manual_journals(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param ManualJournals manual_journals: ManualJournals array with ManualJournal object in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -18768,6 +19457,9 @@ def update_or_create_manual_journals(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18813,6 +19505,7 @@ def update_or_create_purchase_orders(
         self,
         xero_tenant_id,
         purchase_orders,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -18822,6 +19515,7 @@ def update_or_create_purchase_orders(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PurchaseOrders purchase_orders: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -18854,6 +19548,9 @@ def update_or_create_purchase_orders(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18899,6 +19596,7 @@ def update_or_create_quotes(
         self,
         xero_tenant_id,
         quotes,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -18908,6 +19606,7 @@ def update_or_create_quotes(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Quotes quotes: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -18940,6 +19639,9 @@ def update_or_create_quotes(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -18983,6 +19685,7 @@ def update_or_create_repeating_invoices(
         self,
         xero_tenant_id,
         repeating_invoices,
+        idempotency_key=empty,
         summarize_errors=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -18992,6 +19695,7 @@ def update_or_create_repeating_invoices(
         OAuth2 scope: accounting.transactions
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param RepeatingInvoices repeating_invoices: RepeatingInvoices with an array of repeating invoice objects in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool summarize_errors: If false return 200 OK and mix of successfully created objects and any with validation errors
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -19024,6 +19728,9 @@ def update_or_create_repeating_invoices(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19070,6 +19777,7 @@ def update_purchase_order(
         xero_tenant_id,
         purchase_order_id,
         purchase_orders,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19079,6 +19787,7 @@ def update_purchase_order(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str purchase_order_id: Unique identifier for an Purchase Order (required)
         :param PurchaseOrders purchase_orders: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19115,6 +19824,9 @@ def update_purchase_order(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19160,6 +19872,7 @@ def update_purchase_order_attachment_by_file_name(
         purchase_order_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19170,6 +19883,7 @@ def update_purchase_order_attachment_by_file_name(
         :param str purchase_order_id: Unique identifier for an Purchase Order (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19213,6 +19927,9 @@ def update_purchase_order_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19261,6 +19978,7 @@ def update_quote(
         xero_tenant_id,
         quote_id,
         quotes,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19270,6 +19988,7 @@ def update_quote(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str quote_id: Unique identifier for an Quote (required)
         :param Quotes quotes: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19305,6 +20024,9 @@ def update_quote(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19350,6 +20072,7 @@ def update_quote_attachment_by_file_name(
         quote_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19360,6 +20083,7 @@ def update_quote_attachment_by_file_name(
         :param str quote_id: Unique identifier for an Quote (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19403,6 +20127,9 @@ def update_quote_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19449,6 +20176,7 @@ def update_receipt(
         xero_tenant_id,
         receipt_id,
         receipts,
+        idempotency_key=empty,
         unitdp=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -19459,6 +20187,7 @@ def update_receipt(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str receipt_id: Unique identifier for a Receipt (required)
         :param Receipts receipts: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param int unitdp: e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -19499,6 +20228,9 @@ def update_receipt(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19544,6 +20276,7 @@ def update_receipt_attachment_by_file_name(
         receipt_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19554,6 +20287,7 @@ def update_receipt_attachment_by_file_name(
         :param str receipt_id: Unique identifier for a Receipt (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19597,6 +20331,9 @@ def update_receipt_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19643,6 +20380,7 @@ def update_repeating_invoice(
         xero_tenant_id,
         repeating_invoice_id,
         repeating_invoices,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19652,6 +20390,7 @@ def update_repeating_invoice(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str repeating_invoice_id: Unique identifier for a Repeating Invoice (required)
         :param RepeatingInvoices repeating_invoices: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19688,6 +20427,9 @@ def update_repeating_invoice(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19733,6 +20475,7 @@ def update_repeating_invoice_attachment_by_file_name(
         repeating_invoice_id,
         file_name,
         body,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19743,6 +20486,7 @@ def update_repeating_invoice_attachment_by_file_name(
         :param str repeating_invoice_id: Unique identifier for a Repeating Invoice (required)
         :param str file_name: Name of the attachment (required)
         :param str body: Byte array of file in body of request (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19786,6 +20530,9 @@ def update_repeating_invoice_attachment_by_file_name(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19833,6 +20580,7 @@ def update_tax_rate(
         self,
         xero_tenant_id,
         tax_rates,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19841,6 +20589,7 @@ def update_tax_rate(
         OAuth2 scope: accounting.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param TaxRates tax_rates: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19869,6 +20618,9 @@ def update_tax_rate(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -19913,6 +20665,7 @@ def update_tracking_category(
         xero_tenant_id,
         tracking_category_id,
         tracking_category,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -19922,6 +20675,7 @@ def update_tracking_category(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str tracking_category_id: Unique identifier for a TrackingCategory (required)
         :param TrackingCategory tracking_category: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -19958,6 +20712,9 @@ def update_tracking_category(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -20003,6 +20760,7 @@ def update_tracking_options(
         tracking_category_id,
         tracking_option_id,
         tracking_option,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -20013,6 +20771,7 @@ def update_tracking_options(
         :param str tracking_category_id: Unique identifier for a TrackingCategory (required)
         :param str tracking_option_id: Unique identifier for a Tracking Option (required)
         :param TrackingOption tracking_option: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -20056,6 +20815,9 @@ def update_tracking_options(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/accounting/docs/AccountingApi.md b/xero_python/accounting/docs/AccountingApi.md
index deebd107..52194ac4 100644
--- a/xero_python/accounting/docs/AccountingApi.md
+++ b/xero_python/accounting/docs/AccountingApi.md
@@ -65,9 +65,12 @@ Method | HTTP request | Description
 [**delete_batch_payment_by_url_param**](AccountingApi.md#delete_batch_payment_by_url_param) | **POST** /BatchPayments/{BatchPaymentID} | Updates a specific batch payment for invoices and credit notes
 [**delete_contact_group_contact**](AccountingApi.md#delete_contact_group_contact) | **DELETE** /ContactGroups/{ContactGroupID}/Contacts/{ContactID} | Deletes a specific contact from a contact group using a unique contact Id
 [**delete_contact_group_contacts**](AccountingApi.md#delete_contact_group_contacts) | **DELETE** /ContactGroups/{ContactGroupID}/Contacts | Deletes all contacts from a specific contact group
+[**delete_credit_note_allocations**](AccountingApi.md#delete_credit_note_allocations) | **DELETE** /CreditNotes/{CreditNoteID}/Allocations/{AllocationID} | Deletes an Allocation from a Credit Note
 [**delete_item**](AccountingApi.md#delete_item) | **DELETE** /Items/{ItemID} | Deletes a specific item
 [**delete_linked_transaction**](AccountingApi.md#delete_linked_transaction) | **DELETE** /LinkedTransactions/{LinkedTransactionID} | Deletes a specific linked transactions (billable expenses)
+[**delete_overpayment_allocations**](AccountingApi.md#delete_overpayment_allocations) | **DELETE** /Overpayments/{OverpaymentID}/Allocations/{AllocationID} | Deletes an Allocation from an overpayment
 [**delete_payment**](AccountingApi.md#delete_payment) | **POST** /Payments/{PaymentID} | Updates a specific payment for invoices and credit notes
+[**delete_prepayment_allocations**](AccountingApi.md#delete_prepayment_allocations) | **DELETE** /Prepayments/{PrepaymentID}/Allocations/{AllocationID} | Deletes an Allocation from a Prepayment
 [**delete_tracking_category**](AccountingApi.md#delete_tracking_category) | **DELETE** /TrackingCategories/{TrackingCategoryID} | Deletes a specific tracking category
 [**delete_tracking_options**](AccountingApi.md#delete_tracking_options) | **DELETE** /TrackingCategories/{TrackingCategoryID}/Options/{TrackingOptionID} | Deletes a specific option for a specific tracking category
 [**email_invoice**](AccountingApi.md#email_invoice) | **POST** /Invoices/{InvoiceID}/Email | Sends a copy of a specific invoice to related contact via email
@@ -240,7 +243,7 @@ Method | HTTP request | Description
 
 
 # **create_account**
-> Accounts create_account(xero_tenant_id, account)
+> Accounts create_account(xero_tenant_id, account, idempotency_key=idempotency_key)
 
 Creates a new chart of accounts
 
@@ -272,9 +275,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 account = { "Code":"123456", "Name":"Foobar", "Type":"EXPENSE", "Description":"Hello World" } # Account | Account object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new chart of accounts
-    api_response = api_instance.create_account(xero_tenant_id, account)
+    api_response = api_instance.create_account(xero_tenant_id, account, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_account: %s\n" % e)
@@ -286,6 +290,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **account** | [**Account**](Account.md)| Account object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -303,7 +308,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_account_attachment_by_file_name**
-> Attachments create_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body)
+> Attachments create_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates an attachment on a specific account
 
@@ -337,9 +342,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 account_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Account object
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an attachment on a specific account
-    api_response = api_instance.create_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body)
+    api_response = api_instance.create_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_account_attachment_by_file_name: %s\n" % e)
@@ -353,6 +359,7 @@ Name | Type | Description  | Notes
  **account_id** | [**str**](.md)| Unique identifier for Account object | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -370,7 +377,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_bank_transaction_attachment_by_file_name**
-> Attachments create_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body)
+> Attachments create_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates an attachment for a specific bank transaction by filename
 
@@ -404,9 +411,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transaction_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transaction
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an attachment for a specific bank transaction by filename
-    api_response = api_instance.create_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body)
+    api_response = api_instance.create_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_bank_transaction_attachment_by_file_name: %s\n" % e)
@@ -420,6 +428,7 @@ Name | Type | Description  | Notes
  **bank_transaction_id** | [**str**](.md)| Xero generated unique identifier for a bank transaction | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -437,7 +446,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_bank_transaction_history_record**
-> HistoryRecords create_bank_transaction_history_record(xero_tenant_id, bank_transaction_id, history_records)
+> HistoryRecords create_bank_transaction_history_record(xero_tenant_id, bank_transaction_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific bank transactions
 
@@ -470,9 +479,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transaction_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transaction
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific bank transactions
-    api_response = api_instance.create_bank_transaction_history_record(xero_tenant_id, bank_transaction_id, history_records)
+    api_response = api_instance.create_bank_transaction_history_record(xero_tenant_id, bank_transaction_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_bank_transaction_history_record: %s\n" % e)
@@ -485,6 +495,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **bank_transaction_id** | [**str**](.md)| Xero generated unique identifier for a bank transaction | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -502,7 +513,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_bank_transactions**
-> BankTransactions create_bank_transactions(xero_tenant_id, bank_transactions, summarize_errors=summarize_errors, unitdp=unitdp)
+> BankTransactions create_bank_transactions(xero_tenant_id, bank_transactions, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Creates one or more spent or received money transaction
 
@@ -534,11 +545,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transactions = { bankTransactions: [{ type: BankTransaction.TypeEnum.SPEND, contact: { contactID: "00000000-0000-0000-0000-000000000000" }, lineItems: [{ description: "Foobar", quantity: 1.0, unitAmount: 20.0, accountCode: "000" } ], bankAccount: { code: "000" }}]} # BankTransactions | BankTransactions with an array of BankTransaction objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Creates one or more spent or received money transaction
-    api_response = api_instance.create_bank_transactions(xero_tenant_id, bank_transactions, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.create_bank_transactions(xero_tenant_id, bank_transactions, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_bank_transactions: %s\n" % e)
@@ -550,6 +562,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **bank_transactions** | [**BankTransactions**](BankTransactions.md)| BankTransactions with an array of BankTransaction objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -569,7 +582,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_bank_transfer**
-> BankTransfers create_bank_transfer(xero_tenant_id, bank_transfers)
+> BankTransfers create_bank_transfer(xero_tenant_id, bank_transfers, idempotency_key=idempotency_key)
 
 Creates a bank transfer
 
@@ -601,9 +614,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transfers = { "BankTransfers": [ { "FromBankAccount": { "Code": "090", "Name": "My Savings", "AccountID": "00000000-0000-0000-0000-000000000000", "Type": "BANK", "BankAccountNumber": "123455", "Status": "ACTIVE", "BankAccountType": "BANK", "CurrencyCode": "USD", "TaxType": "NONE", "EnablePaymentsToAccount": false, "ShowInExpenseClaims": false, "Class": "ASSET", "ReportingCode": "ASS", "ReportingCodeName": "Assets", "HasAttachments": false, "UpdatedDateUTC": "2016-10-17T13:45:33.993-07:00" }, "ToBankAccount": { "Code": "088", "Name": "Business Wells Fargo", "AccountID": "00000000-0000-0000-0000-000000000000", "Type": "BANK", "BankAccountNumber": "123455", "Status": "ACTIVE", "BankAccountType": "BANK", "CurrencyCode": "USD", "TaxType": "NONE", "EnablePaymentsToAccount": false, "ShowInExpenseClaims": false, "Class": "ASSET", "ReportingCode": "ASS", "ReportingCodeName": "Assets", "HasAttachments": false, "UpdatedDateUTC": "2016-06-03T08:31:14.517-07:00" }, "Amount": "50.00", "FromIsReconciled": true, "ToIsReconciled": true, "Reference": "Sub 098801" } ] } # BankTransfers | BankTransfers with array of BankTransfer objects in request body
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a bank transfer
-    api_response = api_instance.create_bank_transfer(xero_tenant_id, bank_transfers)
+    api_response = api_instance.create_bank_transfer(xero_tenant_id, bank_transfers, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_bank_transfer: %s\n" % e)
@@ -615,6 +629,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **bank_transfers** | [**BankTransfers**](BankTransfers.md)| BankTransfers with array of BankTransfer objects in request body | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -632,7 +647,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_bank_transfer_attachment_by_file_name**
-> Attachments create_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body)
+> Attachments create_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body, idempotency_key=idempotency_key)
 
 
 
@@ -666,8 +681,9 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transfer_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transfer
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
-    api_response = api_instance.create_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body)
+    api_response = api_instance.create_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_bank_transfer_attachment_by_file_name: %s\n" % e)
@@ -681,6 +697,7 @@ Name | Type | Description  | Notes
  **bank_transfer_id** | [**str**](.md)| Xero generated unique identifier for a bank transfer | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -698,7 +715,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_bank_transfer_history_record**
-> HistoryRecords create_bank_transfer_history_record(xero_tenant_id, bank_transfer_id, history_records)
+> HistoryRecords create_bank_transfer_history_record(xero_tenant_id, bank_transfer_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific bank transfer
 
@@ -731,9 +748,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transfer_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transfer
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific bank transfer
-    api_response = api_instance.create_bank_transfer_history_record(xero_tenant_id, bank_transfer_id, history_records)
+    api_response = api_instance.create_bank_transfer_history_record(xero_tenant_id, bank_transfer_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_bank_transfer_history_record: %s\n" % e)
@@ -746,6 +764,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **bank_transfer_id** | [**str**](.md)| Xero generated unique identifier for a bank transfer | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -763,7 +782,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_batch_payment**
-> BatchPayments create_batch_payment(xero_tenant_id, batch_payments, summarize_errors=summarize_errors)
+> BatchPayments create_batch_payment(xero_tenant_id, batch_payments, summarize_errors=summarize_errors, idempotency_key=idempotency_key)
 
 Creates one or many batch payments for invoices
 
@@ -796,9 +815,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 batch_payments = { "BatchPayments": [ { "Account": { "AccountID": "00000000-0000-0000-0000-000000000000" }, "Reference": "ref", "Date": "2018-08-01", "Payments": [ { "Account": { "Code": "001" }, "Date": "2019-12-31", "Amount": 500, "Invoice": { "InvoiceID": "00000000-0000-0000-0000-000000000000", "LineItems": [], "Contact": {}, "Type": "ACCPAY" } } ] } ] } # BatchPayments | BatchPayments with an array of Payments in body of request
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates one or many batch payments for invoices
-    api_response = api_instance.create_batch_payment(xero_tenant_id, batch_payments, summarize_errors=summarize_errors)
+    api_response = api_instance.create_batch_payment(xero_tenant_id, batch_payments, summarize_errors=summarize_errors, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_batch_payment: %s\n" % e)
@@ -811,6 +831,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **batch_payments** | [**BatchPayments**](BatchPayments.md)| BatchPayments with an array of Payments in body of request | 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -828,7 +849,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_batch_payment_history_record**
-> HistoryRecords create_batch_payment_history_record(xero_tenant_id, batch_payment_id, history_records)
+> HistoryRecords create_batch_payment_history_record(xero_tenant_id, batch_payment_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific batch payment
 
@@ -861,9 +882,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 batch_payment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for BatchPayment
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific batch payment
-    api_response = api_instance.create_batch_payment_history_record(xero_tenant_id, batch_payment_id, history_records)
+    api_response = api_instance.create_batch_payment_history_record(xero_tenant_id, batch_payment_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_batch_payment_history_record: %s\n" % e)
@@ -876,6 +898,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **batch_payment_id** | [**str**](.md)| Unique identifier for BatchPayment | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -893,7 +916,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_branding_theme_payment_services**
-> PaymentServices create_branding_theme_payment_services(xero_tenant_id, branding_theme_id, payment_services)
+> PaymentServices create_branding_theme_payment_services(xero_tenant_id, branding_theme_id, payment_services, idempotency_key=idempotency_key)
 
 Creates a new custom payment service for a specific branding theme
 
@@ -926,9 +949,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 branding_theme_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Branding Theme
 payment_services = { "PaymentServices": [ { "PaymentServiceID": "54b3b4f6-0443-4fba-bcd1-61ec0c35ca55", "PaymentServiceName": "PayUpNow", "PaymentServiceUrl": "https://www.payupnow.com/", "PaymentServiceType": "Custom", "PayNowText": "Time To Pay" } ] } # PaymentServices | PaymentServices array with PaymentService object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new custom payment service for a specific branding theme
-    api_response = api_instance.create_branding_theme_payment_services(xero_tenant_id, branding_theme_id, payment_services)
+    api_response = api_instance.create_branding_theme_payment_services(xero_tenant_id, branding_theme_id, payment_services, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_branding_theme_payment_services: %s\n" % e)
@@ -941,6 +965,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **branding_theme_id** | [**str**](.md)| Unique identifier for a Branding Theme | 
  **payment_services** | [**PaymentServices**](PaymentServices.md)| PaymentServices array with PaymentService object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -958,7 +983,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_contact_attachment_by_file_name**
-> Attachments create_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body)
+> Attachments create_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body, idempotency_key=idempotency_key)
 
 
 
@@ -992,8 +1017,9 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Contact
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
-    api_response = api_instance.create_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body)
+    api_response = api_instance.create_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_contact_attachment_by_file_name: %s\n" % e)
@@ -1007,6 +1033,7 @@ Name | Type | Description  | Notes
  **contact_id** | [**str**](.md)| Unique identifier for a Contact | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1024,7 +1051,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_contact_group**
-> ContactGroups create_contact_group(xero_tenant_id, contact_groups)
+> ContactGroups create_contact_group(xero_tenant_id, contact_groups, idempotency_key=idempotency_key)
 
 Creates a contact group
 
@@ -1056,9 +1083,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_groups = { "ContactGroups": [{ "Name": "VIPs" }]} # ContactGroups | ContactGroups with an array of names in request body
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a contact group
-    api_response = api_instance.create_contact_group(xero_tenant_id, contact_groups)
+    api_response = api_instance.create_contact_group(xero_tenant_id, contact_groups, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_contact_group: %s\n" % e)
@@ -1070,6 +1098,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contact_groups** | [**ContactGroups**](ContactGroups.md)| ContactGroups with an array of names in request body | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1087,7 +1116,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_contact_group_contacts**
-> Contacts create_contact_group_contacts(xero_tenant_id, contact_group_id, contacts)
+> Contacts create_contact_group_contacts(xero_tenant_id, contact_group_id, contacts, idempotency_key=idempotency_key)
 
 Creates contacts to a specific contact group
 
@@ -1120,9 +1149,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_group_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Contact Group
 contacts = { "Contacts": [ { "ContactID": "a3675fc4-f8dd-4f03-ba5b-f1870566bcd7" }, { "ContactID": "4e1753b9-018a-4775-b6aa-1bc7871cfee3" } ] } # Contacts | Contacts with array of contacts specifying the ContactID to be added to ContactGroup in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates contacts to a specific contact group
-    api_response = api_instance.create_contact_group_contacts(xero_tenant_id, contact_group_id, contacts)
+    api_response = api_instance.create_contact_group_contacts(xero_tenant_id, contact_group_id, contacts, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_contact_group_contacts: %s\n" % e)
@@ -1135,6 +1165,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contact_group_id** | [**str**](.md)| Unique identifier for a Contact Group | 
  **contacts** | [**Contacts**](Contacts.md)| Contacts with array of contacts specifying the ContactID to be added to ContactGroup in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1152,7 +1183,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_contact_history**
-> HistoryRecords create_contact_history(xero_tenant_id, contact_id, history_records)
+> HistoryRecords create_contact_history(xero_tenant_id, contact_id, history_records, idempotency_key=idempotency_key)
 
 Creates a new history record for a specific contact
 
@@ -1185,9 +1216,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Contact
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new history record for a specific contact
-    api_response = api_instance.create_contact_history(xero_tenant_id, contact_id, history_records)
+    api_response = api_instance.create_contact_history(xero_tenant_id, contact_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_contact_history: %s\n" % e)
@@ -1200,6 +1232,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contact_id** | [**str**](.md)| Unique identifier for a Contact | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1217,7 +1250,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_contacts**
-> Contacts create_contacts(xero_tenant_id, contacts, summarize_errors=summarize_errors)
+> Contacts create_contacts(xero_tenant_id, contacts, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates multiple contacts (bulk) in a Xero organisation
 
@@ -1249,10 +1282,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contacts = { "Contacts": [ { "ContactID": "3ff6d40c-af9a-40a3-89ce-3c1556a25591", "ContactStatus": "ACTIVE", "Name": "Foo9987", "EmailAddress": "sid32476@blah.com", "BankAccountDetails": "", "Addresses": [ { "AddressType": "STREET", "City": "", "Region": "", "PostalCode": "", "Country": "" }, { "AddressType": "POBOX", "City": "", "Region": "", "PostalCode": "", "Country": "" } ], "Phones": [ { "PhoneType": "DEFAULT", "PhoneNumber": "", "PhoneAreaCode": "", "PhoneCountryCode": "" }, { "PhoneType": "DDI", "PhoneNumber": "", "PhoneAreaCode": "", "PhoneCountryCode": "" }, { "PhoneType": "FAX", "PhoneNumber": "", "PhoneAreaCode": "", "PhoneCountryCode": "" }, { "PhoneType": "MOBILE", "PhoneNumber": "555-1212", "PhoneAreaCode": "415", "PhoneCountryCode": "" } ], "UpdatedDateUTC": "/Date(1551399321043+0000)/", "ContactGroups": [], "IsSupplier": false, "IsCustomer": false, "SalesTrackingCategories": [], "PurchasesTrackingCategories": [], "PaymentTerms": { "Bills": { "Day": 15, "Type": "OFCURRENTMONTH" }, "Sales": { "Day": 10, "Type": "DAYSAFTERBILLMONTH" } }, "ContactPersons": [] } ] } # Contacts | Contacts with an array of Contact objects to create in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates multiple contacts (bulk) in a Xero organisation
-    api_response = api_instance.create_contacts(xero_tenant_id, contacts, summarize_errors=summarize_errors)
+    api_response = api_instance.create_contacts(xero_tenant_id, contacts, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_contacts: %s\n" % e)
@@ -1264,6 +1298,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contacts** | [**Contacts**](Contacts.md)| Contacts with an array of Contact objects to create in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -1282,7 +1317,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_credit_note_allocation**
-> Allocations create_credit_note_allocation(xero_tenant_id, credit_note_id, allocations, summarize_errors=summarize_errors)
+> Allocations create_credit_note_allocation(xero_tenant_id, credit_note_id, allocations, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates allocation for a specific credit note
 
@@ -1315,10 +1350,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_note_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Credit Note
 allocations = { "Allocations": [ { "Invoice": { "LineItems": [], "InvoiceID": "c45720a1-ade3-4a38-a064-d15489be6841" }, "Amount": 1, "Date": "2019-03-05" } ] } # Allocations | Allocations with array of Allocation object in body of request.
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates allocation for a specific credit note
-    api_response = api_instance.create_credit_note_allocation(xero_tenant_id, credit_note_id, allocations, summarize_errors=summarize_errors)
+    api_response = api_instance.create_credit_note_allocation(xero_tenant_id, credit_note_id, allocations, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_credit_note_allocation: %s\n" % e)
@@ -1331,6 +1367,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **credit_note_id** | [**str**](.md)| Unique identifier for a Credit Note | 
  **allocations** | [**Allocations**](Allocations.md)| Allocations with array of Allocation object in body of request. | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -1349,7 +1386,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_credit_note_attachment_by_file_name**
-> Attachments create_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body, include_online=include_online)
+> Attachments create_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body, idempotency_key=idempotency_key, include_online=include_online)
 
 Creates an attachment for a specific credit note
 
@@ -1383,10 +1420,11 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_note_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Credit Note
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 include_online = False # bool | Allows an attachment to be seen by the end customer within their online invoice (optional) (default to False)
 try:
     # Creates an attachment for a specific credit note
-    api_response = api_instance.create_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body, include_online=include_online)
+    api_response = api_instance.create_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body, idempotency_key=idempotency_key, include_online=include_online)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_credit_note_attachment_by_file_name: %s\n" % e)
@@ -1400,6 +1438,7 @@ Name | Type | Description  | Notes
  **credit_note_id** | [**str**](.md)| Unique identifier for a Credit Note | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **include_online** | **bool**| Allows an attachment to be seen by the end customer within their online invoice | [optional] [default to False]
 
 ### Return type
@@ -1418,7 +1457,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_credit_note_history**
-> HistoryRecords create_credit_note_history(xero_tenant_id, credit_note_id, history_records)
+> HistoryRecords create_credit_note_history(xero_tenant_id, credit_note_id, history_records, idempotency_key=idempotency_key)
 
 Retrieves history records of a specific credit note
 
@@ -1451,9 +1490,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_note_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Credit Note
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Retrieves history records of a specific credit note
-    api_response = api_instance.create_credit_note_history(xero_tenant_id, credit_note_id, history_records)
+    api_response = api_instance.create_credit_note_history(xero_tenant_id, credit_note_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_credit_note_history: %s\n" % e)
@@ -1466,6 +1506,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **credit_note_id** | [**str**](.md)| Unique identifier for a Credit Note | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1483,7 +1524,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_credit_notes**
-> CreditNotes create_credit_notes(xero_tenant_id, credit_notes, summarize_errors=summarize_errors, unitdp=unitdp)
+> CreditNotes create_credit_notes(xero_tenant_id, credit_notes, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Creates a new credit note
 
@@ -1515,11 +1556,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_notes = { "CreditNotes":[ { "Type":"ACCPAYCREDIT", "Contact":{ "ContactID":"430fa14a-f945-44d3-9f97-5df5e28441b8" }, "Date":"2019-01-05", "LineItems":[ { "Description":"Foobar", "Quantity":2.0, "UnitAmount":20.0, "AccountCode":"400" } ] } ] } # CreditNotes | Credit Notes with array of CreditNote object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Creates a new credit note
-    api_response = api_instance.create_credit_notes(xero_tenant_id, credit_notes, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.create_credit_notes(xero_tenant_id, credit_notes, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_credit_notes: %s\n" % e)
@@ -1531,6 +1573,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **credit_notes** | [**CreditNotes**](CreditNotes.md)| Credit Notes with array of CreditNote object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -1550,7 +1593,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_currency**
-> Currencies create_currency(xero_tenant_id, currency)
+> Currencies create_currency(xero_tenant_id, currency, idempotency_key=idempotency_key)
 
 Create a new currency for a Xero organisation
 
@@ -1582,9 +1625,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 currency = { "Code": "USD", "Description": "United States Dollar" } # Currency | Currency object in the body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Create a new currency for a Xero organisation
-    api_response = api_instance.create_currency(xero_tenant_id, currency)
+    api_response = api_instance.create_currency(xero_tenant_id, currency, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_currency: %s\n" % e)
@@ -1596,6 +1640,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **currency** | [**Currency**](Currency.md)| Currency object in the body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1613,7 +1658,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employees**
-> Employees create_employees(xero_tenant_id, employees, summarize_errors=summarize_errors)
+> Employees create_employees(xero_tenant_id, employees, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates new employees used in Xero payrun
 
@@ -1645,10 +1690,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 employees = { "Employees": [ { "FirstName": "Nick", "LastName": "Fury", "ExternalLink": { "Url": "http://twitter.com/#!/search/Nick+Fury" } } ] } # Employees | Employees with array of Employee object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates new employees used in Xero payrun
-    api_response = api_instance.create_employees(xero_tenant_id, employees, summarize_errors=summarize_errors)
+    api_response = api_instance.create_employees(xero_tenant_id, employees, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_employees: %s\n" % e)
@@ -1660,6 +1706,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employees** | [**Employees**](Employees.md)| Employees with array of Employee object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -1678,7 +1725,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_expense_claim_history**
-> HistoryRecords create_expense_claim_history(xero_tenant_id, expense_claim_id, history_records)
+> HistoryRecords create_expense_claim_history(xero_tenant_id, expense_claim_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific expense claim
 
@@ -1711,9 +1758,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 expense_claim_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a ExpenseClaim
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific expense claim
-    api_response = api_instance.create_expense_claim_history(xero_tenant_id, expense_claim_id, history_records)
+    api_response = api_instance.create_expense_claim_history(xero_tenant_id, expense_claim_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_expense_claim_history: %s\n" % e)
@@ -1726,6 +1774,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **expense_claim_id** | [**str**](.md)| Unique identifier for a ExpenseClaim | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1743,7 +1792,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_expense_claims**
-> ExpenseClaims create_expense_claims(xero_tenant_id, expense_claims)
+> ExpenseClaims create_expense_claims(xero_tenant_id, expense_claims, idempotency_key=idempotency_key)
 
 Creates expense claims
 
@@ -1775,9 +1824,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 expense_claims = { "ExpenseClaims": [ { "Status": "SUBMITTED", "User": { "UserID": "d1164823-0ac1-41ad-987b-b4e30fe0b273" }, "Receipts": [ { "Lineitems": [], "ReceiptID": "dc1c7f6d-0a4c-402f-acac-551d62ce5816" } ] } ] } # ExpenseClaims | ExpenseClaims with array of ExpenseClaim object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates expense claims
-    api_response = api_instance.create_expense_claims(xero_tenant_id, expense_claims)
+    api_response = api_instance.create_expense_claims(xero_tenant_id, expense_claims, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_expense_claims: %s\n" % e)
@@ -1789,6 +1839,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **expense_claims** | [**ExpenseClaims**](ExpenseClaims.md)| ExpenseClaims with array of ExpenseClaim object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1806,7 +1857,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_invoice_attachment_by_file_name**
-> Attachments create_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body, include_online=include_online)
+> Attachments create_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body, idempotency_key=idempotency_key, include_online=include_online)
 
 Creates an attachment for a specific invoice or purchase bill by filename
 
@@ -1840,10 +1891,11 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Invoice
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 include_online = False # bool | Allows an attachment to be seen by the end customer within their online invoice (optional) (default to False)
 try:
     # Creates an attachment for a specific invoice or purchase bill by filename
-    api_response = api_instance.create_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body, include_online=include_online)
+    api_response = api_instance.create_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body, idempotency_key=idempotency_key, include_online=include_online)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_invoice_attachment_by_file_name: %s\n" % e)
@@ -1857,6 +1909,7 @@ Name | Type | Description  | Notes
  **invoice_id** | [**str**](.md)| Unique identifier for an Invoice | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **include_online** | **bool**| Allows an attachment to be seen by the end customer within their online invoice | [optional] [default to False]
 
 ### Return type
@@ -1875,7 +1928,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_invoice_history**
-> HistoryRecords create_invoice_history(xero_tenant_id, invoice_id, history_records)
+> HistoryRecords create_invoice_history(xero_tenant_id, invoice_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific invoice
 
@@ -1908,9 +1961,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Invoice
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific invoice
-    api_response = api_instance.create_invoice_history(xero_tenant_id, invoice_id, history_records)
+    api_response = api_instance.create_invoice_history(xero_tenant_id, invoice_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_invoice_history: %s\n" % e)
@@ -1923,6 +1977,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **invoice_id** | [**str**](.md)| Unique identifier for an Invoice | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1940,7 +1995,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_invoices**
-> Invoices create_invoices(xero_tenant_id, invoices, summarize_errors=summarize_errors, unitdp=unitdp)
+> Invoices create_invoices(xero_tenant_id, invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Creates one or more sales invoices or purchase bills
 
@@ -1972,11 +2027,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoices = { "Invoices": [ { "Type": "ACCREC", "Contact": { "ContactID": "430fa14a-f945-44d3-9f97-5df5e28441b8" }, "LineItems": [ { "Description": "Acme Tires", "Quantity": 2, "UnitAmount": 20, "AccountCode": "200", "TaxType": "NONE", "LineAmount": 40 } ], "Date": "2019-03-11", "DueDate": "2018-12-10", "Reference": "Website Design", "Status": "AUTHORISED" } ] } # Invoices | Invoices with an array of invoice objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Creates one or more sales invoices or purchase bills
-    api_response = api_instance.create_invoices(xero_tenant_id, invoices, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.create_invoices(xero_tenant_id, invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_invoices: %s\n" % e)
@@ -1988,6 +2044,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **invoices** | [**Invoices**](Invoices.md)| Invoices with an array of invoice objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -2007,7 +2064,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_item_history**
-> HistoryRecords create_item_history(xero_tenant_id, item_id, history_records)
+> HistoryRecords create_item_history(xero_tenant_id, item_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific item
 
@@ -2040,9 +2097,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 item_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Item
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific item
-    api_response = api_instance.create_item_history(xero_tenant_id, item_id, history_records)
+    api_response = api_instance.create_item_history(xero_tenant_id, item_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_item_history: %s\n" % e)
@@ -2055,6 +2113,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **item_id** | [**str**](.md)| Unique identifier for an Item | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2072,7 +2131,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_items**
-> Items create_items(xero_tenant_id, items, summarize_errors=summarize_errors, unitdp=unitdp)
+> Items create_items(xero_tenant_id, items, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Creates one or more items
 
@@ -2104,11 +2163,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 items = { "Items": [ { "Code": "code123", "Name": "Item Name XYZ", "Description": "Foobar", "InventoryAssetAccountCode": "140", "PurchaseDetails": { "COGSAccountCode": "500" } } ] } # Items | Items with an array of Item objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Creates one or more items
-    api_response = api_instance.create_items(xero_tenant_id, items, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.create_items(xero_tenant_id, items, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_items: %s\n" % e)
@@ -2120,6 +2180,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **items** | [**Items**](Items.md)| Items with an array of Item objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -2139,7 +2200,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_linked_transaction**
-> LinkedTransactions create_linked_transaction(xero_tenant_id, linked_transaction)
+> LinkedTransactions create_linked_transaction(xero_tenant_id, linked_transaction, idempotency_key=idempotency_key)
 
 Creates linked transactions (billable expenses)
 
@@ -2171,9 +2232,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 linked_transaction = { "LinkedTransactions": [ { "SourceTransactionID": "a848644a-f20f-4630-98c3-386bd7505631", "SourceLineItemID": "b0df260d-3cc8-4ced-9bd6-41924f624ed3" } ] } # LinkedTransaction | LinkedTransaction object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates linked transactions (billable expenses)
-    api_response = api_instance.create_linked_transaction(xero_tenant_id, linked_transaction)
+    api_response = api_instance.create_linked_transaction(xero_tenant_id, linked_transaction, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_linked_transaction: %s\n" % e)
@@ -2185,6 +2247,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **linked_transaction** | [**LinkedTransaction**](LinkedTransaction.md)| LinkedTransaction object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2202,7 +2265,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_manual_journal_attachment_by_file_name**
-> Attachments create_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body)
+> Attachments create_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates a specific attachment for a specific manual journal by file name
 
@@ -2236,9 +2299,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 manual_journal_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a ManualJournal
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a specific attachment for a specific manual journal by file name
-    api_response = api_instance.create_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body)
+    api_response = api_instance.create_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_manual_journal_attachment_by_file_name: %s\n" % e)
@@ -2252,6 +2316,7 @@ Name | Type | Description  | Notes
  **manual_journal_id** | [**str**](.md)| Unique identifier for a ManualJournal | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2269,7 +2334,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_manual_journal_history_record**
-> HistoryRecords create_manual_journal_history_record(xero_tenant_id, manual_journal_id, history_records)
+> HistoryRecords create_manual_journal_history_record(xero_tenant_id, manual_journal_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific manual journal
 
@@ -2302,9 +2367,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 manual_journal_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a ManualJournal
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific manual journal
-    api_response = api_instance.create_manual_journal_history_record(xero_tenant_id, manual_journal_id, history_records)
+    api_response = api_instance.create_manual_journal_history_record(xero_tenant_id, manual_journal_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_manual_journal_history_record: %s\n" % e)
@@ -2317,6 +2383,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **manual_journal_id** | [**str**](.md)| Unique identifier for a ManualJournal | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2334,7 +2401,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_manual_journals**
-> ManualJournals create_manual_journals(xero_tenant_id, manual_journals, summarize_errors=summarize_errors)
+> ManualJournals create_manual_journals(xero_tenant_id, manual_journals, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates one or more manual journals
 
@@ -2366,10 +2433,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 manual_journals = { "ManualJournals": [ { "Narration": "Journal Desc", "JournalLines": [ { "LineAmount": 100, "AccountCode": "400", "Description": "Money Movement" }, { "LineAmount": -100, "AccountCode": "400", "Description": "Prepayment of things", "Tracking": [ { "Name": "North", "Option": "Region" } ] } ], "Date": "2019-03-14" } ] } # ManualJournals | ManualJournals array with ManualJournal object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates one or more manual journals
-    api_response = api_instance.create_manual_journals(xero_tenant_id, manual_journals, summarize_errors=summarize_errors)
+    api_response = api_instance.create_manual_journals(xero_tenant_id, manual_journals, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_manual_journals: %s\n" % e)
@@ -2381,6 +2449,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **manual_journals** | [**ManualJournals**](ManualJournals.md)| ManualJournals array with ManualJournal object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -2399,7 +2468,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_overpayment_allocations**
-> Allocations create_overpayment_allocations(xero_tenant_id, overpayment_id, allocations, summarize_errors=summarize_errors)
+> Allocations create_overpayment_allocations(xero_tenant_id, overpayment_id, allocations, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates a single allocation for a specific overpayment
 
@@ -2432,10 +2501,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 overpayment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Overpayment
 allocations = { "Allocations": [ { "Invoice": { "InvoiceID": "00000000-0000-0000-0000-000000000000", "LineItems": [], "Contact": {}, "Type": "ACCPAY" }, "Amount": 10.00, "Date": "2019-03-12" } ] } # Allocations | Allocations array with Allocation object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates a single allocation for a specific overpayment
-    api_response = api_instance.create_overpayment_allocations(xero_tenant_id, overpayment_id, allocations, summarize_errors=summarize_errors)
+    api_response = api_instance.create_overpayment_allocations(xero_tenant_id, overpayment_id, allocations, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_overpayment_allocations: %s\n" % e)
@@ -2448,6 +2518,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **overpayment_id** | [**str**](.md)| Unique identifier for a Overpayment | 
  **allocations** | [**Allocations**](Allocations.md)| Allocations array with Allocation object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -2466,7 +2537,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_overpayment_history**
-> HistoryRecords create_overpayment_history(xero_tenant_id, overpayment_id, history_records)
+> HistoryRecords create_overpayment_history(xero_tenant_id, overpayment_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific overpayment
 
@@ -2499,9 +2570,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 overpayment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Overpayment
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific overpayment
-    api_response = api_instance.create_overpayment_history(xero_tenant_id, overpayment_id, history_records)
+    api_response = api_instance.create_overpayment_history(xero_tenant_id, overpayment_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_overpayment_history: %s\n" % e)
@@ -2514,6 +2586,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **overpayment_id** | [**str**](.md)| Unique identifier for a Overpayment | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2531,7 +2604,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_payment**
-> Payments create_payment(xero_tenant_id, payment)
+> Payments create_payment(xero_tenant_id, payment, idempotency_key=idempotency_key)
 
 Creates a single payment for invoice or credit notes
 
@@ -2563,9 +2636,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 payment = { "Payments": [ { "Invoice": { "LineItems": [], "InvoiceID": "00000000-0000-0000-0000-000000000000" }, "Account": { "Code": "970" }, "Date": "2019-03-12", "Amount": 1 } ] } # Payment | Request body with a single Payment object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a single payment for invoice or credit notes
-    api_response = api_instance.create_payment(xero_tenant_id, payment)
+    api_response = api_instance.create_payment(xero_tenant_id, payment, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_payment: %s\n" % e)
@@ -2577,6 +2651,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payment** | [**Payment**](Payment.md)| Request body with a single Payment object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2594,7 +2669,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_payment_history**
-> HistoryRecords create_payment_history(xero_tenant_id, payment_id, history_records)
+> HistoryRecords create_payment_history(xero_tenant_id, payment_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific payment
 
@@ -2627,9 +2702,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 payment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Payment
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific payment
-    api_response = api_instance.create_payment_history(xero_tenant_id, payment_id, history_records)
+    api_response = api_instance.create_payment_history(xero_tenant_id, payment_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_payment_history: %s\n" % e)
@@ -2642,6 +2718,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payment_id** | [**str**](.md)| Unique identifier for a Payment | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2659,7 +2736,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_payment_service**
-> PaymentServices create_payment_service(xero_tenant_id, payment_services)
+> PaymentServices create_payment_service(xero_tenant_id, payment_services, idempotency_key=idempotency_key)
 
 Creates a payment service
 
@@ -2691,9 +2768,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 payment_services = { "PaymentServices": [ { "PaymentServiceName": "PayUpNow", "PaymentServiceUrl": "https://www.payupnow.com/", "PayNowText": "Time To Pay" } ] } # PaymentServices | PaymentServices array with PaymentService object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a payment service
-    api_response = api_instance.create_payment_service(xero_tenant_id, payment_services)
+    api_response = api_instance.create_payment_service(xero_tenant_id, payment_services, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_payment_service: %s\n" % e)
@@ -2705,6 +2783,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payment_services** | [**PaymentServices**](PaymentServices.md)| PaymentServices array with PaymentService object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2722,7 +2801,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_payments**
-> Payments create_payments(xero_tenant_id, payments, summarize_errors=summarize_errors)
+> Payments create_payments(xero_tenant_id, payments, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates multiple payments for invoices or credit notes
 
@@ -2754,10 +2833,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 payments = { "Payments": [ { "Invoice": { "LineItems": [], "InvoiceID": "00000000-0000-0000-0000-000000000000" }, "Account": { "Code": "970" }, "Date": "2019-03-12", "Amount": 1 } ] } # Payments | Payments array with Payment object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates multiple payments for invoices or credit notes
-    api_response = api_instance.create_payments(xero_tenant_id, payments, summarize_errors=summarize_errors)
+    api_response = api_instance.create_payments(xero_tenant_id, payments, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_payments: %s\n" % e)
@@ -2769,6 +2849,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payments** | [**Payments**](Payments.md)| Payments array with Payment object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -2787,7 +2868,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_prepayment_allocations**
-> Allocations create_prepayment_allocations(xero_tenant_id, prepayment_id, allocations, summarize_errors=summarize_errors)
+> Allocations create_prepayment_allocations(xero_tenant_id, prepayment_id, allocations, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Allows you to create an Allocation for prepayments
 
@@ -2820,10 +2901,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 prepayment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a PrePayment
 allocations = { "Allocations": [ { "Invoice": { "LineItems": [], "InvoiceID": "00000000-0000-0000-0000-000000000000" }, "Amount": 1, "Date": "2019-01-10" } ] } # Allocations | Allocations with an array of Allocation object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Allows you to create an Allocation for prepayments
-    api_response = api_instance.create_prepayment_allocations(xero_tenant_id, prepayment_id, allocations, summarize_errors=summarize_errors)
+    api_response = api_instance.create_prepayment_allocations(xero_tenant_id, prepayment_id, allocations, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_prepayment_allocations: %s\n" % e)
@@ -2836,6 +2918,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **prepayment_id** | [**str**](.md)| Unique identifier for a PrePayment | 
  **allocations** | [**Allocations**](Allocations.md)| Allocations with an array of Allocation object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -2854,7 +2937,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_prepayment_history**
-> HistoryRecords create_prepayment_history(xero_tenant_id, prepayment_id, history_records)
+> HistoryRecords create_prepayment_history(xero_tenant_id, prepayment_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific prepayment
 
@@ -2887,9 +2970,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 prepayment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a PrePayment
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific prepayment
-    api_response = api_instance.create_prepayment_history(xero_tenant_id, prepayment_id, history_records)
+    api_response = api_instance.create_prepayment_history(xero_tenant_id, prepayment_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_prepayment_history: %s\n" % e)
@@ -2902,6 +2986,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **prepayment_id** | [**str**](.md)| Unique identifier for a PrePayment | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2919,7 +3004,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_purchase_order_attachment_by_file_name**
-> Attachments create_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body)
+> Attachments create_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates attachment for a specific purchase order
 
@@ -2953,9 +3038,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 purchase_order_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Purchase Order
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates attachment for a specific purchase order
-    api_response = api_instance.create_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body)
+    api_response = api_instance.create_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_purchase_order_attachment_by_file_name: %s\n" % e)
@@ -2969,6 +3055,7 @@ Name | Type | Description  | Notes
  **purchase_order_id** | [**str**](.md)| Unique identifier for an Purchase Order | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -2986,7 +3073,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_purchase_order_history**
-> HistoryRecords create_purchase_order_history(xero_tenant_id, purchase_order_id, history_records)
+> HistoryRecords create_purchase_order_history(xero_tenant_id, purchase_order_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific purchase orders
 
@@ -3019,9 +3106,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 purchase_order_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Purchase Order
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific purchase orders
-    api_response = api_instance.create_purchase_order_history(xero_tenant_id, purchase_order_id, history_records)
+    api_response = api_instance.create_purchase_order_history(xero_tenant_id, purchase_order_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_purchase_order_history: %s\n" % e)
@@ -3034,6 +3122,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **purchase_order_id** | [**str**](.md)| Unique identifier for an Purchase Order | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3051,7 +3140,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_purchase_orders**
-> PurchaseOrders create_purchase_orders(xero_tenant_id, purchase_orders, summarize_errors=summarize_errors)
+> PurchaseOrders create_purchase_orders(xero_tenant_id, purchase_orders, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates one or more purchase orders
 
@@ -3083,10 +3172,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 purchase_orders = { "PurchaseOrders": [ { "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "LineItems": [ { "Description": "Foobar", "Quantity": 1, "UnitAmount": 20, "AccountCode": "710" } ], "Date": "2019-03-13" } ] } # PurchaseOrders | PurchaseOrders with an array of PurchaseOrder object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates one or more purchase orders
-    api_response = api_instance.create_purchase_orders(xero_tenant_id, purchase_orders, summarize_errors=summarize_errors)
+    api_response = api_instance.create_purchase_orders(xero_tenant_id, purchase_orders, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_purchase_orders: %s\n" % e)
@@ -3098,6 +3188,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **purchase_orders** | [**PurchaseOrders**](PurchaseOrders.md)| PurchaseOrders with an array of PurchaseOrder object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -3116,7 +3207,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_quote_attachment_by_file_name**
-> Attachments create_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body)
+> Attachments create_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates attachment for a specific quote
 
@@ -3150,9 +3241,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 quote_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Quote
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates attachment for a specific quote
-    api_response = api_instance.create_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body)
+    api_response = api_instance.create_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_quote_attachment_by_file_name: %s\n" % e)
@@ -3166,6 +3258,7 @@ Name | Type | Description  | Notes
  **quote_id** | [**str**](.md)| Unique identifier for an Quote | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3183,7 +3276,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_quote_history**
-> HistoryRecords create_quote_history(xero_tenant_id, quote_id, history_records)
+> HistoryRecords create_quote_history(xero_tenant_id, quote_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific quote
 
@@ -3216,9 +3309,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 quote_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Quote
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific quote
-    api_response = api_instance.create_quote_history(xero_tenant_id, quote_id, history_records)
+    api_response = api_instance.create_quote_history(xero_tenant_id, quote_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_quote_history: %s\n" % e)
@@ -3231,6 +3325,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **quote_id** | [**str**](.md)| Unique identifier for an Quote | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3248,7 +3343,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_quotes**
-> Quotes create_quotes(xero_tenant_id, quotes, summarize_errors=summarize_errors)
+> Quotes create_quotes(xero_tenant_id, quotes, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Create one or more quotes
 
@@ -3280,10 +3375,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 quotes = { "Quotes": [ { "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "LineItems": [ { "Description": "Foobar", "Quantity": 1, "UnitAmount": 20, "AccountCode": "12775" } ], "Date": "2020-02-01" } ] } # Quotes | Quotes with an array of Quote object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Create one or more quotes
-    api_response = api_instance.create_quotes(xero_tenant_id, quotes, summarize_errors=summarize_errors)
+    api_response = api_instance.create_quotes(xero_tenant_id, quotes, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_quotes: %s\n" % e)
@@ -3295,6 +3391,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **quotes** | [**Quotes**](Quotes.md)| Quotes with an array of Quote object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -3313,7 +3410,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_receipt**
-> Receipts create_receipt(xero_tenant_id, receipts, unitdp=unitdp)
+> Receipts create_receipt(xero_tenant_id, receipts, idempotency_key=idempotency_key, unitdp=unitdp)
 
 Creates draft expense claim receipts for any user
 
@@ -3345,10 +3442,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 receipts = { "Receipts": [ { "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "Lineitems": [ { "Description": "Foobar", "Quantity": 2, "UnitAmount": 20, "AccountCode": "400", "TaxType": "NONE", "LineAmount": 40 } ], "User": { "UserID": "00000000-0000-0000-0000-000000000000" }, "LineAmountTypes": "NoTax", "Status": "DRAFT" } ] } # Receipts | Receipts with an array of Receipt object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Creates draft expense claim receipts for any user
-    api_response = api_instance.create_receipt(xero_tenant_id, receipts, unitdp=unitdp)
+    api_response = api_instance.create_receipt(xero_tenant_id, receipts, idempotency_key=idempotency_key, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_receipt: %s\n" % e)
@@ -3360,6 +3458,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **receipts** | [**Receipts**](Receipts.md)| Receipts with an array of Receipt object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
 ### Return type
@@ -3378,7 +3477,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_receipt_attachment_by_file_name**
-> Attachments create_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body)
+> Attachments create_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates an attachment on a specific expense claim receipts by file name
 
@@ -3412,9 +3511,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 receipt_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Receipt
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an attachment on a specific expense claim receipts by file name
-    api_response = api_instance.create_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body)
+    api_response = api_instance.create_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_receipt_attachment_by_file_name: %s\n" % e)
@@ -3428,6 +3528,7 @@ Name | Type | Description  | Notes
  **receipt_id** | [**str**](.md)| Unique identifier for a Receipt | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3445,7 +3546,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_receipt_history**
-> HistoryRecords create_receipt_history(xero_tenant_id, receipt_id, history_records)
+> HistoryRecords create_receipt_history(xero_tenant_id, receipt_id, history_records, idempotency_key=idempotency_key)
 
 Creates a history record for a specific receipt
 
@@ -3478,9 +3579,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 receipt_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Receipt
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a history record for a specific receipt
-    api_response = api_instance.create_receipt_history(xero_tenant_id, receipt_id, history_records)
+    api_response = api_instance.create_receipt_history(xero_tenant_id, receipt_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_receipt_history: %s\n" % e)
@@ -3493,6 +3595,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **receipt_id** | [**str**](.md)| Unique identifier for a Receipt | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3510,7 +3613,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_repeating_invoice_attachment_by_file_name**
-> Attachments create_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body)
+> Attachments create_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body, idempotency_key=idempotency_key)
 
 Creates an attachment from a specific repeating invoices by file name
 
@@ -3544,9 +3647,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 repeating_invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Repeating Invoice
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an attachment from a specific repeating invoices by file name
-    api_response = api_instance.create_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body)
+    api_response = api_instance.create_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_repeating_invoice_attachment_by_file_name: %s\n" % e)
@@ -3560,6 +3664,7 @@ Name | Type | Description  | Notes
  **repeating_invoice_id** | [**str**](.md)| Unique identifier for a Repeating Invoice | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3577,7 +3682,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_repeating_invoice_history**
-> HistoryRecords create_repeating_invoice_history(xero_tenant_id, repeating_invoice_id, history_records)
+> HistoryRecords create_repeating_invoice_history(xero_tenant_id, repeating_invoice_id, history_records, idempotency_key=idempotency_key)
 
 Creates a  history record for a specific repeating invoice
 
@@ -3610,9 +3715,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 repeating_invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Repeating Invoice
 history_records = { "HistoryRecords": [ { "Details": "Hello World" } ] } # HistoryRecords | HistoryRecords containing an array of HistoryRecord objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a  history record for a specific repeating invoice
-    api_response = api_instance.create_repeating_invoice_history(xero_tenant_id, repeating_invoice_id, history_records)
+    api_response = api_instance.create_repeating_invoice_history(xero_tenant_id, repeating_invoice_id, history_records, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_repeating_invoice_history: %s\n" % e)
@@ -3625,6 +3731,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **repeating_invoice_id** | [**str**](.md)| Unique identifier for a Repeating Invoice | 
  **history_records** | [**HistoryRecords**](HistoryRecords.md)| HistoryRecords containing an array of HistoryRecord objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3642,7 +3749,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_repeating_invoices**
-> RepeatingInvoices create_repeating_invoices(xero_tenant_id, repeating_invoices, summarize_errors=summarize_errors)
+> RepeatingInvoices create_repeating_invoices(xero_tenant_id, repeating_invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates one or more repeating invoice templates
 
@@ -3674,10 +3781,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 repeating_invoices = { "RepeatingInvoices": [ { "Schedule": { "Period": 1, "Unit": "MONTHLY", "DueDate": 10, "DueDateType": "OFFOLLOWINGMONTH", "StartDate": "\/Date(1555286400000+0000)\/" }, "Type": "ACCREC", "Reference": "[Week]", "ApprovedForSending": false, "SendCopy": false, "MarkAsSent": false, "IncludePDF": false, "Contact": { "ContactID": "430fa14a-f945-44d3-9f97-5df5e28441b8", "Name": "Liam Gallagher" }, "Status": "AUTHORISED", "LineAmountTypes": "Exclusive", "LineItems": [ { "Description": "Guitars Fender Strat", "UnitAmount": 5000.00, "TaxType": "OUTPUT2", "TaxAmount": 750.00, "LineAmount": 5000.00, "AccountCode": "200", "Tracking": [], "Quantity": 1.0000, "LineItemID": "13a8353c-d2af-4d5b-920c-438449f08900", "DiscountEnteredAsPercent": true } ], "CurrencyCode": "NZD" } ] } # RepeatingInvoices | RepeatingInvoices with an array of repeating invoice objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates one or more repeating invoice templates
-    api_response = api_instance.create_repeating_invoices(xero_tenant_id, repeating_invoices, summarize_errors=summarize_errors)
+    api_response = api_instance.create_repeating_invoices(xero_tenant_id, repeating_invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_repeating_invoices: %s\n" % e)
@@ -3689,6 +3797,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **repeating_invoices** | [**RepeatingInvoices**](RepeatingInvoices.md)| RepeatingInvoices with an array of repeating invoice objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -3707,7 +3816,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_tax_rates**
-> TaxRates create_tax_rates(xero_tenant_id, tax_rates)
+> TaxRates create_tax_rates(xero_tenant_id, tax_rates, idempotency_key=idempotency_key)
 
 Creates one or more tax rates
 
@@ -3739,9 +3848,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 tax_rates = { "TaxRates": [ { "Name": "CA State Tax", "TaxComponents": [ { "Name": "State Tax", "Rate": 2.25 } ] } ] } # TaxRates | TaxRates array with TaxRate object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates one or more tax rates
-    api_response = api_instance.create_tax_rates(xero_tenant_id, tax_rates)
+    api_response = api_instance.create_tax_rates(xero_tenant_id, tax_rates, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_tax_rates: %s\n" % e)
@@ -3753,6 +3863,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **tax_rates** | [**TaxRates**](TaxRates.md)| TaxRates array with TaxRate object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3770,7 +3881,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_tracking_category**
-> TrackingCategories create_tracking_category(xero_tenant_id, tracking_category)
+> TrackingCategories create_tracking_category(xero_tenant_id, tracking_category, idempotency_key=idempotency_key)
 
 Create tracking categories
 
@@ -3802,9 +3913,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 tracking_category = { name: "FooBar" } # TrackingCategory | TrackingCategory object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Create tracking categories
-    api_response = api_instance.create_tracking_category(xero_tenant_id, tracking_category)
+    api_response = api_instance.create_tracking_category(xero_tenant_id, tracking_category, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_tracking_category: %s\n" % e)
@@ -3816,6 +3928,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **tracking_category** | [**TrackingCategory**](TrackingCategory.md)| TrackingCategory object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3833,7 +3946,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_tracking_options**
-> TrackingOptions create_tracking_options(xero_tenant_id, tracking_category_id, tracking_option)
+> TrackingOptions create_tracking_options(xero_tenant_id, tracking_category_id, tracking_option, idempotency_key=idempotency_key)
 
 Creates options for a specific tracking category
 
@@ -3866,9 +3979,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 tracking_category_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a TrackingCategory
 tracking_option = { name: " Bar" } # TrackingOption | TrackingOption object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates options for a specific tracking category
-    api_response = api_instance.create_tracking_options(xero_tenant_id, tracking_category_id, tracking_option)
+    api_response = api_instance.create_tracking_options(xero_tenant_id, tracking_category_id, tracking_option, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->create_tracking_options: %s\n" % e)
@@ -3881,6 +3995,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **tracking_category_id** | [**str**](.md)| Unique identifier for a TrackingCategory | 
  **tracking_option** | [**TrackingOption**](TrackingOption.md)| TrackingOption object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3961,7 +4076,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **delete_batch_payment**
-> BatchPayments delete_batch_payment(xero_tenant_id, batch_payment_delete)
+> BatchPayments delete_batch_payment(xero_tenant_id, batch_payment_delete, idempotency_key=idempotency_key)
 
 Updates a specific batch payment for invoices and credit notes
 
@@ -3993,9 +4108,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 batch_payment_delete = { "BatchPaymentID": "9bf296e9-0748-4d29-a3dc-24dde1098030", "Status":"DELETED" } # BatchPaymentDelete | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific batch payment for invoices and credit notes
-    api_response = api_instance.delete_batch_payment(xero_tenant_id, batch_payment_delete)
+    api_response = api_instance.delete_batch_payment(xero_tenant_id, batch_payment_delete, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->delete_batch_payment: %s\n" % e)
@@ -4007,6 +4123,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **batch_payment_delete** | [**BatchPaymentDelete**](BatchPaymentDelete.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4024,7 +4141,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **delete_batch_payment_by_url_param**
-> BatchPayments delete_batch_payment_by_url_param(xero_tenant_id, batch_payment_id, batch_payment_delete_by_url_param)
+> BatchPayments delete_batch_payment_by_url_param(xero_tenant_id, batch_payment_id, batch_payment_delete_by_url_param, idempotency_key=idempotency_key)
 
 Updates a specific batch payment for invoices and credit notes
 
@@ -4057,9 +4174,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 batch_payment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for BatchPayment
 batch_payment_delete_by_url_param = { "Status":"DELETED" } # BatchPaymentDeleteByUrlParam | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific batch payment for invoices and credit notes
-    api_response = api_instance.delete_batch_payment_by_url_param(xero_tenant_id, batch_payment_id, batch_payment_delete_by_url_param)
+    api_response = api_instance.delete_batch_payment_by_url_param(xero_tenant_id, batch_payment_id, batch_payment_delete_by_url_param, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->delete_batch_payment_by_url_param: %s\n" % e)
@@ -4072,6 +4190,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **batch_payment_id** | [**str**](.md)| Unique identifier for BatchPayment | 
  **batch_payment_delete_by_url_param** | [**BatchPaymentDeleteByUrlParam**](BatchPaymentDeleteByUrlParam.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4214,6 +4333,71 @@ void (empty response body)
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **delete_credit_note_allocations**
+> Allocation delete_credit_note_allocations(xero_tenant_id, credit_note_id, allocation_id)
+
+Deletes an Allocation from a Credit Note
+
+### Example
+
+* OAuth Authentication (OAuth2): 
+```python
+from xero_python.api_client import Configuration, ApiClient
+from xero_python.api_client.oauth2 import OAuth2Token
+from xero_python.exceptions import ApiException
+from xero_python.accounting import AccountingApi
+from pprint import pprint
+
+# Configure OAuth2 access token for authorization: OAuth2
+# simplified version, `xero_oauth2_token` represents permanent global token storage
+xero_oauth2_token = {} # set to valid xero oauth2 token dictionary
+# create client configuration with client id and client secret for automatic token refresh
+api_config = Configuration(oauth2_token=OAuth2Token(
+    client_id="YOUR_API_CLIENT_ID", client_secret="YOUR_API_CLIENT_SECRET"
+))
+# configure xero-python sdk client
+api_client = ApiClient(
+    api_config,
+    oauth2_token_saver=lambda x: xero_oauth2_token.update(x),
+    oauth2_token_getter=lambda : xero_oauth2_token
+)
+# create an instance of the API class
+api_instance = AccountingApi(api_client)
+
+xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
+credit_note_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Credit Note
+allocation_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Allocation object
+try:
+    # Deletes an Allocation from a Credit Note
+    api_response = api_instance.delete_credit_note_allocations(xero_tenant_id, credit_note_id, allocation_id)
+    pprint(api_response)
+except ApiException as e:
+    print("Exception when calling AccountingApi->delete_credit_note_allocations: %s\n" % e)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **xero_tenant_id** | **str**| Xero identifier for Tenant | 
+ **credit_note_id** | [**str**](.md)| Unique identifier for a Credit Note | 
+ **allocation_id** | [**str**](.md)| Unique identifier for Allocation object | 
+
+### Return type
+
+[**Allocation**](Allocation.md)
+
+### Authorization
+
+[OAuth2](../README.md#OAuth2)
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
 # **delete_item**
 > delete_item(xero_tenant_id, item_id)
 
@@ -4338,8 +4522,73 @@ void (empty response body)
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **delete_overpayment_allocations**
+> Allocation delete_overpayment_allocations(xero_tenant_id, overpayment_id, allocation_id)
+
+Deletes an Allocation from an overpayment
+
+### Example
+
+* OAuth Authentication (OAuth2): 
+```python
+from xero_python.api_client import Configuration, ApiClient
+from xero_python.api_client.oauth2 import OAuth2Token
+from xero_python.exceptions import ApiException
+from xero_python.accounting import AccountingApi
+from pprint import pprint
+
+# Configure OAuth2 access token for authorization: OAuth2
+# simplified version, `xero_oauth2_token` represents permanent global token storage
+xero_oauth2_token = {} # set to valid xero oauth2 token dictionary
+# create client configuration with client id and client secret for automatic token refresh
+api_config = Configuration(oauth2_token=OAuth2Token(
+    client_id="YOUR_API_CLIENT_ID", client_secret="YOUR_API_CLIENT_SECRET"
+))
+# configure xero-python sdk client
+api_client = ApiClient(
+    api_config,
+    oauth2_token_saver=lambda x: xero_oauth2_token.update(x),
+    oauth2_token_getter=lambda : xero_oauth2_token
+)
+# create an instance of the API class
+api_instance = AccountingApi(api_client)
+
+xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
+overpayment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Overpayment
+allocation_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Allocation object
+try:
+    # Deletes an Allocation from an overpayment
+    api_response = api_instance.delete_overpayment_allocations(xero_tenant_id, overpayment_id, allocation_id)
+    pprint(api_response)
+except ApiException as e:
+    print("Exception when calling AccountingApi->delete_overpayment_allocations: %s\n" % e)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **xero_tenant_id** | **str**| Xero identifier for Tenant | 
+ **overpayment_id** | [**str**](.md)| Unique identifier for a Overpayment | 
+ **allocation_id** | [**str**](.md)| Unique identifier for Allocation object | 
+
+### Return type
+
+[**Allocation**](Allocation.md)
+
+### Authorization
+
+[OAuth2](../README.md#OAuth2)
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
 # **delete_payment**
-> Payments delete_payment(xero_tenant_id, payment_id, payment_delete)
+> Payments delete_payment(xero_tenant_id, payment_id, payment_delete, idempotency_key=idempotency_key)
 
 Updates a specific payment for invoices and credit notes
 
@@ -4372,9 +4621,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 payment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Payment
 payment_delete = { "Payments":[ { "Status":"DELETED" } ] } # PaymentDelete | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific payment for invoices and credit notes
-    api_response = api_instance.delete_payment(xero_tenant_id, payment_id, payment_delete)
+    api_response = api_instance.delete_payment(xero_tenant_id, payment_id, payment_delete, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->delete_payment: %s\n" % e)
@@ -4387,6 +4637,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payment_id** | [**str**](.md)| Unique identifier for a Payment | 
  **payment_delete** | [**PaymentDelete**](PaymentDelete.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4403,6 +4654,71 @@ Name | Type | Description  | Notes
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **delete_prepayment_allocations**
+> Allocation delete_prepayment_allocations(xero_tenant_id, prepayment_id, allocation_id)
+
+Deletes an Allocation from a Prepayment
+
+### Example
+
+* OAuth Authentication (OAuth2): 
+```python
+from xero_python.api_client import Configuration, ApiClient
+from xero_python.api_client.oauth2 import OAuth2Token
+from xero_python.exceptions import ApiException
+from xero_python.accounting import AccountingApi
+from pprint import pprint
+
+# Configure OAuth2 access token for authorization: OAuth2
+# simplified version, `xero_oauth2_token` represents permanent global token storage
+xero_oauth2_token = {} # set to valid xero oauth2 token dictionary
+# create client configuration with client id and client secret for automatic token refresh
+api_config = Configuration(oauth2_token=OAuth2Token(
+    client_id="YOUR_API_CLIENT_ID", client_secret="YOUR_API_CLIENT_SECRET"
+))
+# configure xero-python sdk client
+api_client = ApiClient(
+    api_config,
+    oauth2_token_saver=lambda x: xero_oauth2_token.update(x),
+    oauth2_token_getter=lambda : xero_oauth2_token
+)
+# create an instance of the API class
+api_instance = AccountingApi(api_client)
+
+xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
+prepayment_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a PrePayment
+allocation_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Allocation object
+try:
+    # Deletes an Allocation from a Prepayment
+    api_response = api_instance.delete_prepayment_allocations(xero_tenant_id, prepayment_id, allocation_id)
+    pprint(api_response)
+except ApiException as e:
+    print("Exception when calling AccountingApi->delete_prepayment_allocations: %s\n" % e)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **xero_tenant_id** | **str**| Xero identifier for Tenant | 
+ **prepayment_id** | [**str**](.md)| Unique identifier for a PrePayment | 
+ **allocation_id** | [**str**](.md)| Unique identifier for Allocation object | 
+
+### Return type
+
+[**Allocation**](Allocation.md)
+
+### Authorization
+
+[OAuth2](../README.md#OAuth2)
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
 # **delete_tracking_category**
 > TrackingCategories delete_tracking_category(xero_tenant_id, tracking_category_id)
 
@@ -4532,7 +4848,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **email_invoice**
-> email_invoice(xero_tenant_id, invoice_id, request_empty)
+> email_invoice(xero_tenant_id, invoice_id, request_empty, idempotency_key=idempotency_key)
 
 Sends a copy of a specific invoice to related contact via email
 
@@ -4565,9 +4881,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Invoice
 request_empty = {} # RequestEmpty | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Sends a copy of a specific invoice to related contact via email
-    api_instance.email_invoice(xero_tenant_id, invoice_id, request_empty)
+    api_instance.email_invoice(xero_tenant_id, invoice_id, request_empty, idempotency_key=idempotency_key)
 except ApiException as e:
     print("Exception when calling AccountingApi->email_invoice: %s\n" % e)
 ```
@@ -4579,6 +4896,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **invoice_id** | [**str**](.md)| Unique identifier for an Invoice | 
  **request_empty** | [**RequestEmpty**](RequestEmpty.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -12913,7 +13231,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **post_setup**
-> ImportSummaryObject post_setup(xero_tenant_id, setup)
+> ImportSummaryObject post_setup(xero_tenant_id, setup, idempotency_key=idempotency_key)
 
 Sets the chart of accounts, the conversion date and conversion balances
 
@@ -12945,9 +13263,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 setup = { "ConversionDate": {}, "ConversionBalances": [], "Accounts": [ { "Code": "200", "Name": "Sales", "Type": "SALES", "ReportingCode": "REV.TRA.GOO" }, { "Code": "400", "Name": "Advertising", "Type": "OVERHEADS", "ReportingCode": "EXP" }, { "Code": "610", "Name": "Accounts Receivable", "Type": "CURRENT", "SystemAccount": "DEBTORS", "ReportingCode": "ASS.CUR.REC.TRA" }, { "Code": "800", "Name": "Accounts Payable", "Type": "CURRLIAB", "SystemAccount": "CREDITORS", "ReportingCode": "LIA.CUR.PAY" } ] } # Setup | Object including an accounts array, a conversion balances array and a conversion date object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Sets the chart of accounts, the conversion date and conversion balances
-    api_response = api_instance.post_setup(xero_tenant_id, setup)
+    api_response = api_instance.post_setup(xero_tenant_id, setup, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->post_setup: %s\n" % e)
@@ -12959,6 +13278,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **setup** | [**Setup**](Setup.md)| Object including an accounts array, a conversion balances array and a conversion date object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -12976,7 +13296,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_account**
-> Accounts update_account(xero_tenant_id, account_id, accounts)
+> Accounts update_account(xero_tenant_id, account_id, accounts, idempotency_key=idempotency_key)
 
 Updates a chart of accounts
 
@@ -13009,9 +13329,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 account_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Account object
 accounts = { "Accounts":[ { "Code":"123456", "Name":"BarFoo", "AccountID":"99ce6032-0678-4aa0-8148-240c75fee33a", "Type":"EXPENSE", "Description":"GoodBye World", "TaxType":"INPUT", "EnablePaymentsToAccount":false, "ShowInExpenseClaims":false, "Class":"EXPENSE", "ReportingCode":"EXP", "ReportingCodeName":"Expense", "UpdatedDateUTC":"2019-02-21T16:29:47.96-08:00" } ] } # Accounts | Request of type Accounts array with one Account
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a chart of accounts
-    api_response = api_instance.update_account(xero_tenant_id, account_id, accounts)
+    api_response = api_instance.update_account(xero_tenant_id, account_id, accounts, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_account: %s\n" % e)
@@ -13024,6 +13345,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **account_id** | [**str**](.md)| Unique identifier for Account object | 
  **accounts** | [**Accounts**](Accounts.md)| Request of type Accounts array with one Account | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13041,7 +13363,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_account_attachment_by_file_name**
-> Attachments update_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body)
+> Attachments update_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates attachment on a specific account by filename
 
@@ -13075,9 +13397,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 account_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Account object
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates attachment on a specific account by filename
-    api_response = api_instance.update_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body)
+    api_response = api_instance.update_account_attachment_by_file_name(xero_tenant_id, account_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_account_attachment_by_file_name: %s\n" % e)
@@ -13091,6 +13414,7 @@ Name | Type | Description  | Notes
  **account_id** | [**str**](.md)| Unique identifier for Account object | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13108,7 +13432,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_bank_transaction**
-> BankTransactions update_bank_transaction(xero_tenant_id, bank_transaction_id, bank_transactions, unitdp=unitdp)
+> BankTransactions update_bank_transaction(xero_tenant_id, bank_transaction_id, bank_transactions, idempotency_key=idempotency_key, unitdp=unitdp)
 
 Updates a single spent or received money transaction
 
@@ -13141,10 +13465,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transaction_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transaction
 bank_transactions = { "BankTransactions": [ { "Type": "SPEND", "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000", "ContactStatus": "ACTIVE", "Name": "Buzz Lightyear", "FirstName": "Buzz", "LastName": "Lightyear", "EmailAddress": "buzz.Lightyear@email.com", "ContactPersons": [], "BankAccountDetails": "", "Addresses": [ { "AddressType": "STREET", "City": "", "Region": "", "PostalCode": "", "Country": "" }, { "AddressType": "POBOX", "AddressLine1": "", "AddressLine2": "", "AddressLine3": "", "AddressLine4": "", "City": "Palo Alto", "Region": "CA", "PostalCode": "94020", "Country": "United States" } ], "Phones": [ { "PhoneType": "DEFAULT", "PhoneNumber": "847-1294", "PhoneAreaCode": "(626)", "PhoneCountryCode": "" }, { "PhoneType": "DDI", "PhoneNumber": "", "PhoneAreaCode": "", "PhoneCountryCode": "" }, { "PhoneType": "FAX", "PhoneNumber": "", "PhoneAreaCode": "", "PhoneCountryCode": "" }, { "PhoneType": "MOBILE", "PhoneNumber": "", "PhoneAreaCode": "", "PhoneCountryCode": "" } ], "UpdatedDateUTC": "2017-08-21T13:49:04.227-07:00", "ContactGroups": [] }, "Lineitems": [], "BankAccount": { "Code": "088", "Name": "Business Wells Fargo", "AccountID": "00000000-0000-0000-0000-000000000000" }, "IsReconciled": false, "Date": "2019-02-25", "Reference": "You just updated", "CurrencyCode": "USD", "CurrencyRate": 1, "Status": "AUTHORISED", "LineAmountTypes": "Inclusive", "TotalTax": 1.74, "BankTransactionID": "00000000-0000-0000-0000-000000000000", "UpdatedDateUTC": "2019-02-26T12:39:27.813-08:00" } ] } # BankTransactions | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates a single spent or received money transaction
-    api_response = api_instance.update_bank_transaction(xero_tenant_id, bank_transaction_id, bank_transactions, unitdp=unitdp)
+    api_response = api_instance.update_bank_transaction(xero_tenant_id, bank_transaction_id, bank_transactions, idempotency_key=idempotency_key, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_bank_transaction: %s\n" % e)
@@ -13157,6 +13482,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **bank_transaction_id** | [**str**](.md)| Xero generated unique identifier for a bank transaction | 
  **bank_transactions** | [**BankTransactions**](BankTransactions.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
 ### Return type
@@ -13175,7 +13501,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_bank_transaction_attachment_by_file_name**
-> Attachments update_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body)
+> Attachments update_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates a specific attachment from a specific bank transaction by filename
 
@@ -13209,9 +13535,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transaction_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transaction
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific attachment from a specific bank transaction by filename
-    api_response = api_instance.update_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body)
+    api_response = api_instance.update_bank_transaction_attachment_by_file_name(xero_tenant_id, bank_transaction_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_bank_transaction_attachment_by_file_name: %s\n" % e)
@@ -13225,6 +13552,7 @@ Name | Type | Description  | Notes
  **bank_transaction_id** | [**str**](.md)| Xero generated unique identifier for a bank transaction | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13242,7 +13570,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_bank_transfer_attachment_by_file_name**
-> Attachments update_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body)
+> Attachments update_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body, idempotency_key=idempotency_key)
 
 
 
@@ -13276,8 +13604,9 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transfer_id = '00000000-0000-0000-0000-000000000000' # str | Xero generated unique identifier for a bank transfer
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
-    api_response = api_instance.update_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body)
+    api_response = api_instance.update_bank_transfer_attachment_by_file_name(xero_tenant_id, bank_transfer_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_bank_transfer_attachment_by_file_name: %s\n" % e)
@@ -13291,6 +13620,7 @@ Name | Type | Description  | Notes
  **bank_transfer_id** | [**str**](.md)| Xero generated unique identifier for a bank transfer | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13308,7 +13638,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_contact**
-> Contacts update_contact(xero_tenant_id, contact_id, contacts)
+> Contacts update_contact(xero_tenant_id, contact_id, contacts, idempotency_key=idempotency_key)
 
 Updates a specific contact in a Xero organisation
 
@@ -13341,9 +13671,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Contact
 contacts = { "Contacts": [{ "ContactID": "00000000-0000-0000-0000-000000000000", "Name": "Thanos" }]} # Contacts | an array of Contacts containing single Contact object with properties to update
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific contact in a Xero organisation
-    api_response = api_instance.update_contact(xero_tenant_id, contact_id, contacts)
+    api_response = api_instance.update_contact(xero_tenant_id, contact_id, contacts, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_contact: %s\n" % e)
@@ -13356,6 +13687,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contact_id** | [**str**](.md)| Unique identifier for a Contact | 
  **contacts** | [**Contacts**](Contacts.md)| an array of Contacts containing single Contact object with properties to update | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13373,7 +13705,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_contact_attachment_by_file_name**
-> Attachments update_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body)
+> Attachments update_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body, idempotency_key=idempotency_key)
 
 
 
@@ -13407,8 +13739,9 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Contact
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
-    api_response = api_instance.update_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body)
+    api_response = api_instance.update_contact_attachment_by_file_name(xero_tenant_id, contact_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_contact_attachment_by_file_name: %s\n" % e)
@@ -13422,6 +13755,7 @@ Name | Type | Description  | Notes
  **contact_id** | [**str**](.md)| Unique identifier for a Contact | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13439,7 +13773,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_contact_group**
-> ContactGroups update_contact_group(xero_tenant_id, contact_group_id, contact_groups)
+> ContactGroups update_contact_group(xero_tenant_id, contact_group_id, contact_groups, idempotency_key=idempotency_key)
 
 Updates a specific contact group
 
@@ -13472,9 +13806,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contact_group_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Contact Group
 contact_groups = { "ContactGroups":[ { "Name":"Suppliers" } ] } # ContactGroups | an array of Contact groups with Name of specific group to update
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific contact group
-    api_response = api_instance.update_contact_group(xero_tenant_id, contact_group_id, contact_groups)
+    api_response = api_instance.update_contact_group(xero_tenant_id, contact_group_id, contact_groups, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_contact_group: %s\n" % e)
@@ -13487,6 +13822,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contact_group_id** | [**str**](.md)| Unique identifier for a Contact Group | 
  **contact_groups** | [**ContactGroups**](ContactGroups.md)| an array of Contact groups with Name of specific group to update | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13504,7 +13840,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_credit_note**
-> CreditNotes update_credit_note(xero_tenant_id, credit_note_id, credit_notes, unitdp=unitdp)
+> CreditNotes update_credit_note(xero_tenant_id, credit_note_id, credit_notes, idempotency_key=idempotency_key, unitdp=unitdp)
 
 Updates a specific credit note
 
@@ -13537,10 +13873,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_note_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Credit Note
 credit_notes = { "CreditNotes": [ { "Type": "ACCPAYCREDIT", "Contact": { "ContactID": "430fa14a-f945-44d3-9f97-5df5e28441b8" }, "Date": "2019-01-05", "Status": "AUTHORISED", "Reference": "HelloWorld", "LineItems": [ { "Description": "Foobar", "Quantity": 2, "UnitAmount": 20, "AccountCode": "400" } ] } ] } # CreditNotes | an array of Credit Notes containing credit note details to update
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates a specific credit note
-    api_response = api_instance.update_credit_note(xero_tenant_id, credit_note_id, credit_notes, unitdp=unitdp)
+    api_response = api_instance.update_credit_note(xero_tenant_id, credit_note_id, credit_notes, idempotency_key=idempotency_key, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_credit_note: %s\n" % e)
@@ -13553,6 +13890,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **credit_note_id** | [**str**](.md)| Unique identifier for a Credit Note | 
  **credit_notes** | [**CreditNotes**](CreditNotes.md)| an array of Credit Notes containing credit note details to update | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
 ### Return type
@@ -13571,7 +13909,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_credit_note_attachment_by_file_name**
-> Attachments update_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body)
+> Attachments update_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates attachments on a specific credit note by file name
 
@@ -13605,9 +13943,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_note_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Credit Note
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates attachments on a specific credit note by file name
-    api_response = api_instance.update_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body)
+    api_response = api_instance.update_credit_note_attachment_by_file_name(xero_tenant_id, credit_note_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_credit_note_attachment_by_file_name: %s\n" % e)
@@ -13621,6 +13960,7 @@ Name | Type | Description  | Notes
  **credit_note_id** | [**str**](.md)| Unique identifier for a Credit Note | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13638,7 +13978,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_expense_claim**
-> ExpenseClaims update_expense_claim(xero_tenant_id, expense_claim_id, expense_claims)
+> ExpenseClaims update_expense_claim(xero_tenant_id, expense_claim_id, expense_claims, idempotency_key=idempotency_key)
 
 Updates a specific expense claims
 
@@ -13671,9 +14011,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 expense_claim_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a ExpenseClaim
 expense_claims = { "ExpenseClaims": [ { "Status": "SUBMITTED", "User": { "UserID": "d1164823-0ac1-41ad-987b-b4e30fe0b273" }, "Receipts": [ { "Lineitems": [], "ReceiptID": "dc1c7f6d-0a4c-402f-acac-551d62ce5816" } ] } ] } # ExpenseClaims | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific expense claims
-    api_response = api_instance.update_expense_claim(xero_tenant_id, expense_claim_id, expense_claims)
+    api_response = api_instance.update_expense_claim(xero_tenant_id, expense_claim_id, expense_claims, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_expense_claim: %s\n" % e)
@@ -13686,6 +14027,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **expense_claim_id** | [**str**](.md)| Unique identifier for a ExpenseClaim | 
  **expense_claims** | [**ExpenseClaims**](ExpenseClaims.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13703,7 +14045,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_invoice**
-> Invoices update_invoice(xero_tenant_id, invoice_id, invoices, unitdp=unitdp)
+> Invoices update_invoice(xero_tenant_id, invoice_id, invoices, idempotency_key=idempotency_key, unitdp=unitdp)
 
 Updates a specific sales invoices or purchase bills
 
@@ -13736,10 +14078,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Invoice
 invoices = { "Invoices": [{ Reference: "May the force be with you", "InvoiceID": "00000000-0000-0000-0000-000000000000", "LineItems": [], "Contact": {}, "Type": "ACCPAY" }]} # Invoices | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates a specific sales invoices or purchase bills
-    api_response = api_instance.update_invoice(xero_tenant_id, invoice_id, invoices, unitdp=unitdp)
+    api_response = api_instance.update_invoice(xero_tenant_id, invoice_id, invoices, idempotency_key=idempotency_key, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_invoice: %s\n" % e)
@@ -13752,6 +14095,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **invoice_id** | [**str**](.md)| Unique identifier for an Invoice | 
  **invoices** | [**Invoices**](Invoices.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
 ### Return type
@@ -13770,7 +14114,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_invoice_attachment_by_file_name**
-> Attachments update_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body)
+> Attachments update_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates an attachment from a specific invoices or purchase bill by filename
 
@@ -13804,9 +14148,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Invoice
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates an attachment from a specific invoices or purchase bill by filename
-    api_response = api_instance.update_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body)
+    api_response = api_instance.update_invoice_attachment_by_file_name(xero_tenant_id, invoice_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_invoice_attachment_by_file_name: %s\n" % e)
@@ -13820,6 +14165,7 @@ Name | Type | Description  | Notes
  **invoice_id** | [**str**](.md)| Unique identifier for an Invoice | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13837,7 +14183,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_item**
-> Items update_item(xero_tenant_id, item_id, items, unitdp=unitdp)
+> Items update_item(xero_tenant_id, item_id, items, idempotency_key=idempotency_key, unitdp=unitdp)
 
 Updates a specific item
 
@@ -13870,10 +14216,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 item_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Item
 items = { "Items": [ { "Code": "ItemCode123", "Description": "Description 123" } ] } # Items | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates a specific item
-    api_response = api_instance.update_item(xero_tenant_id, item_id, items, unitdp=unitdp)
+    api_response = api_instance.update_item(xero_tenant_id, item_id, items, idempotency_key=idempotency_key, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_item: %s\n" % e)
@@ -13886,6 +14233,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **item_id** | [**str**](.md)| Unique identifier for an Item | 
  **items** | [**Items**](Items.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
 ### Return type
@@ -13904,7 +14252,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_linked_transaction**
-> LinkedTransactions update_linked_transaction(xero_tenant_id, linked_transaction_id, linked_transactions)
+> LinkedTransactions update_linked_transaction(xero_tenant_id, linked_transaction_id, linked_transactions, idempotency_key=idempotency_key)
 
 Updates a specific linked transactions (billable expenses)
 
@@ -13937,9 +14285,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 linked_transaction_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a LinkedTransaction
 linked_transactions = { "LinkedTransactions": [ { "SourceTransactionID": "00000000-0000-0000-0000-000000000000", "SourceLineItemID": "00000000-0000-0000-0000-000000000000" } ] } # LinkedTransactions | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific linked transactions (billable expenses)
-    api_response = api_instance.update_linked_transaction(xero_tenant_id, linked_transaction_id, linked_transactions)
+    api_response = api_instance.update_linked_transaction(xero_tenant_id, linked_transaction_id, linked_transactions, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_linked_transaction: %s\n" % e)
@@ -13952,6 +14301,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **linked_transaction_id** | [**str**](.md)| Unique identifier for a LinkedTransaction | 
  **linked_transactions** | [**LinkedTransactions**](LinkedTransactions.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -13969,7 +14319,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_manual_journal**
-> ManualJournals update_manual_journal(xero_tenant_id, manual_journal_id, manual_journals)
+> ManualJournals update_manual_journal(xero_tenant_id, manual_journal_id, manual_journals, idempotency_key=idempotency_key)
 
 Updates a specific manual journal
 
@@ -14002,9 +14352,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 manual_journal_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a ManualJournal
 manual_journals = { "ManualJournals": [ { "Narration": "Hello Xero", "ManualJournalID": "00000000-0000-0000-0000-000000000000", "JournalLines": [] } ] } # ManualJournals | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific manual journal
-    api_response = api_instance.update_manual_journal(xero_tenant_id, manual_journal_id, manual_journals)
+    api_response = api_instance.update_manual_journal(xero_tenant_id, manual_journal_id, manual_journals, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_manual_journal: %s\n" % e)
@@ -14017,6 +14368,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **manual_journal_id** | [**str**](.md)| Unique identifier for a ManualJournal | 
  **manual_journals** | [**ManualJournals**](ManualJournals.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -14034,7 +14386,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_manual_journal_attachment_by_file_name**
-> Attachments update_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body)
+> Attachments update_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates a specific attachment from a specific manual journal by file name
 
@@ -14068,9 +14420,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 manual_journal_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a ManualJournal
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific attachment from a specific manual journal by file name
-    api_response = api_instance.update_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body)
+    api_response = api_instance.update_manual_journal_attachment_by_file_name(xero_tenant_id, manual_journal_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_manual_journal_attachment_by_file_name: %s\n" % e)
@@ -14084,6 +14437,7 @@ Name | Type | Description  | Notes
  **manual_journal_id** | [**str**](.md)| Unique identifier for a ManualJournal | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -14101,7 +14455,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_bank_transactions**
-> BankTransactions update_or_create_bank_transactions(xero_tenant_id, bank_transactions, summarize_errors=summarize_errors, unitdp=unitdp)
+> BankTransactions update_or_create_bank_transactions(xero_tenant_id, bank_transactions, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Updates or creates one or more spent or received money transaction
 
@@ -14133,11 +14487,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 bank_transactions = { "BankTransactions": [ { "Type": "SPEND", "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "Lineitems": [ { "Description": "Foobar", "Quantity": 1, "UnitAmount": 20, "AccountCode": "400" } ], "BankAccount": { "Code": "088" } } ] } # BankTransactions | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates or creates one or more spent or received money transaction
-    api_response = api_instance.update_or_create_bank_transactions(xero_tenant_id, bank_transactions, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.update_or_create_bank_transactions(xero_tenant_id, bank_transactions, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_bank_transactions: %s\n" % e)
@@ -14149,6 +14504,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **bank_transactions** | [**BankTransactions**](BankTransactions.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -14168,7 +14524,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_contacts**
-> Contacts update_or_create_contacts(xero_tenant_id, contacts, summarize_errors=summarize_errors)
+> Contacts update_or_create_contacts(xero_tenant_id, contacts, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Updates or creates one or more contacts in a Xero organisation
 
@@ -14200,10 +14556,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 contacts = { "Contacts": [ { "Name": "Bruce Banner", "EmailAddress": "hulk@avengers.com", "Phones": [ { "PhoneType": "MOBILE", "PhoneNumber": "555-1212", "PhoneAreaCode": "415" } ], "PaymentTerms": { "Bills": { "Day": 15, "Type": "OFCURRENTMONTH" }, "Sales": { "Day": 10, "Type": "DAYSAFTERBILLMONTH" } } } ] } # Contacts | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Updates or creates one or more contacts in a Xero organisation
-    api_response = api_instance.update_or_create_contacts(xero_tenant_id, contacts, summarize_errors=summarize_errors)
+    api_response = api_instance.update_or_create_contacts(xero_tenant_id, contacts, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_contacts: %s\n" % e)
@@ -14215,6 +14572,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **contacts** | [**Contacts**](Contacts.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -14233,7 +14591,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_credit_notes**
-> CreditNotes update_or_create_credit_notes(xero_tenant_id, credit_notes, summarize_errors=summarize_errors, unitdp=unitdp)
+> CreditNotes update_or_create_credit_notes(xero_tenant_id, credit_notes, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Updates or creates one or more credit notes
 
@@ -14265,11 +14623,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 credit_notes = { "CreditNotes":[ { "Type":"ACCPAYCREDIT", "Contact":{ "ContactID":"430fa14a-f945-44d3-9f97-5df5e28441b8" }, "Date":"2019-01-05", "Status":"AUTHORISED", "Reference": "HelloWorld", "LineItems":[ { "Description":"Foobar", "Quantity":2.0, "UnitAmount":20.0, "AccountCode":"400" } ] } ] } # CreditNotes | an array of Credit Notes with a single CreditNote object.
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates or creates one or more credit notes
-    api_response = api_instance.update_or_create_credit_notes(xero_tenant_id, credit_notes, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.update_or_create_credit_notes(xero_tenant_id, credit_notes, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_credit_notes: %s\n" % e)
@@ -14281,6 +14640,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **credit_notes** | [**CreditNotes**](CreditNotes.md)| an array of Credit Notes with a single CreditNote object. | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -14300,7 +14660,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_employees**
-> Employees update_or_create_employees(xero_tenant_id, employees, summarize_errors=summarize_errors)
+> Employees update_or_create_employees(xero_tenant_id, employees, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates a single new employees used in Xero payrun
 
@@ -14332,10 +14692,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 employees = { "Employees": [ { "FirstName": "Nick", "LastName": "Fury", "ExternalLink": { "Url": "http://twitter.com/#!/search/Nick+Fury" } } ] } # Employees | Employees with array of Employee object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates a single new employees used in Xero payrun
-    api_response = api_instance.update_or_create_employees(xero_tenant_id, employees, summarize_errors=summarize_errors)
+    api_response = api_instance.update_or_create_employees(xero_tenant_id, employees, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_employees: %s\n" % e)
@@ -14347,6 +14708,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employees** | [**Employees**](Employees.md)| Employees with array of Employee object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -14365,7 +14727,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_invoices**
-> Invoices update_or_create_invoices(xero_tenant_id, invoices, summarize_errors=summarize_errors, unitdp=unitdp)
+> Invoices update_or_create_invoices(xero_tenant_id, invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Updates or creates one or more sales invoices or purchase bills
 
@@ -14397,11 +14759,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 invoices = { "Invoices": [ { "Type": "ACCREC", "Contact": { "ContactID": "430fa14a-f945-44d3-9f97-5df5e28441b8" }, "LineItems": [ { "Description": "Acme Tires", "Quantity": 2, "UnitAmount": 20, "AccountCode": "200", "TaxType": "NONE", "LineAmount": 40 } ], "Date": "2019-03-11", "DueDate": "2018-12-10", "Reference": "Website Design", "Status": "AUTHORISED" } ] } # Invoices | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates or creates one or more sales invoices or purchase bills
-    api_response = api_instance.update_or_create_invoices(xero_tenant_id, invoices, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.update_or_create_invoices(xero_tenant_id, invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_invoices: %s\n" % e)
@@ -14413,6 +14776,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **invoices** | [**Invoices**](Invoices.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -14432,7 +14796,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_items**
-> Items update_or_create_items(xero_tenant_id, items, summarize_errors=summarize_errors, unitdp=unitdp)
+> Items update_or_create_items(xero_tenant_id, items, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
 
 Updates or creates one or more items
 
@@ -14464,11 +14828,12 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 items = { "Items": [ { "Code": "ItemCode123", "Name": "ItemName XYZ", "Description": "Item Description ABC" } ] } # Items | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates or creates one or more items
-    api_response = api_instance.update_or_create_items(xero_tenant_id, items, summarize_errors=summarize_errors, unitdp=unitdp)
+    api_response = api_instance.update_or_create_items(xero_tenant_id, items, idempotency_key=idempotency_key, summarize_errors=summarize_errors, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_items: %s\n" % e)
@@ -14480,6 +14845,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **items** | [**Items**](Items.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
@@ -14499,7 +14865,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_manual_journals**
-> ManualJournals update_or_create_manual_journals(xero_tenant_id, manual_journals, summarize_errors=summarize_errors)
+> ManualJournals update_or_create_manual_journals(xero_tenant_id, manual_journals, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Updates or creates a single manual journal
 
@@ -14531,10 +14897,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 manual_journals = { "ManualJournals": [ { "Narration": "Journal Desc", "JournalLines": [ { "LineAmount": 100, "AccountCode": "400", "Description": "Money Movement" }, { "LineAmount": -100, "AccountCode": "400", "Description": "Prepayment of things", "Tracking": [ { "Name": "North", "Option": "Region" } ] } ], "Date": "2019-03-14" } ] } # ManualJournals | ManualJournals array with ManualJournal object in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Updates or creates a single manual journal
-    api_response = api_instance.update_or_create_manual_journals(xero_tenant_id, manual_journals, summarize_errors=summarize_errors)
+    api_response = api_instance.update_or_create_manual_journals(xero_tenant_id, manual_journals, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_manual_journals: %s\n" % e)
@@ -14546,6 +14913,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **manual_journals** | [**ManualJournals**](ManualJournals.md)| ManualJournals array with ManualJournal object in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -14564,7 +14932,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_purchase_orders**
-> PurchaseOrders update_or_create_purchase_orders(xero_tenant_id, purchase_orders, summarize_errors=summarize_errors)
+> PurchaseOrders update_or_create_purchase_orders(xero_tenant_id, purchase_orders, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Updates or creates one or more purchase orders
 
@@ -14596,10 +14964,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 purchase_orders = { "PurchaseOrders": [ { "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "LineItems": [ { "Description": "Foobar", "Quantity": 1, "UnitAmount": 20, "AccountCode": "710" } ], "Date": "2019-03-13" } ] } # PurchaseOrders | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Updates or creates one or more purchase orders
-    api_response = api_instance.update_or_create_purchase_orders(xero_tenant_id, purchase_orders, summarize_errors=summarize_errors)
+    api_response = api_instance.update_or_create_purchase_orders(xero_tenant_id, purchase_orders, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_purchase_orders: %s\n" % e)
@@ -14611,6 +14980,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **purchase_orders** | [**PurchaseOrders**](PurchaseOrders.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -14629,7 +14999,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_quotes**
-> Quotes update_or_create_quotes(xero_tenant_id, quotes, summarize_errors=summarize_errors)
+> Quotes update_or_create_quotes(xero_tenant_id, quotes, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Updates or creates one or more quotes
 
@@ -14661,10 +15031,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 quotes = { "Quotes": [ { "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "LineItems": [ { "Description": "Foobar", "Quantity": 1, "UnitAmount": 20, "AccountCode": "12775" } ], "Date": "2020-02-01" } ] } # Quotes | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Updates or creates one or more quotes
-    api_response = api_instance.update_or_create_quotes(xero_tenant_id, quotes, summarize_errors=summarize_errors)
+    api_response = api_instance.update_or_create_quotes(xero_tenant_id, quotes, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_quotes: %s\n" % e)
@@ -14676,6 +15047,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **quotes** | [**Quotes**](Quotes.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -14694,7 +15066,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_or_create_repeating_invoices**
-> RepeatingInvoices update_or_create_repeating_invoices(xero_tenant_id, repeating_invoices, summarize_errors=summarize_errors)
+> RepeatingInvoices update_or_create_repeating_invoices(xero_tenant_id, repeating_invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
 
 Creates or deletes one or more repeating invoice templates
 
@@ -14726,10 +15098,11 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 repeating_invoices = { "RepeatingInvoices": [ { "Schedule": { "Period": 1, "Unit": "MONTHLY", "DueDate": 10, "DueDateType": "OFFOLLOWINGMONTH", "StartDate": "\/Date(1555286400000+0000)\/" }, "Type": "ACCREC", "Reference": "[Week]", "ApprovedForSending": false, "SendCopy": false, "MarkAsSent": false, "IncludePDF": false, "Contact": { "ContactID": "430fa14a-f945-44d3-9f97-5df5e28441b8", "Name": "Liam Gallagher" }, "Status": "AUTHORISED", "LineAmountTypes": "Exclusive", "LineItems": [ { "Description": "Guitars Fender Strat", "UnitAmount": 5000.00, "TaxType": "OUTPUT2", "TaxAmount": 750.00, "LineAmount": 5000.00, "AccountCode": "200", "Tracking": [], "Quantity": 1.0000, "LineItemID": "13a8353c-d2af-4d5b-920c-438449f08900", "DiscountEnteredAsPercent": true } ], "CurrencyCode": "NZD" } ] } # RepeatingInvoices | RepeatingInvoices with an array of repeating invoice objects in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 summarize_errors = False # bool | If false return 200 OK and mix of successfully created objects and any with validation errors (optional) (default to False)
 try:
     # Creates or deletes one or more repeating invoice templates
-    api_response = api_instance.update_or_create_repeating_invoices(xero_tenant_id, repeating_invoices, summarize_errors=summarize_errors)
+    api_response = api_instance.update_or_create_repeating_invoices(xero_tenant_id, repeating_invoices, idempotency_key=idempotency_key, summarize_errors=summarize_errors)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_or_create_repeating_invoices: %s\n" % e)
@@ -14741,6 +15114,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **repeating_invoices** | [**RepeatingInvoices**](RepeatingInvoices.md)| RepeatingInvoices with an array of repeating invoice objects in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **summarize_errors** | **bool**| If false return 200 OK and mix of successfully created objects and any with validation errors | [optional] [default to False]
 
 ### Return type
@@ -14759,7 +15133,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_purchase_order**
-> PurchaseOrders update_purchase_order(xero_tenant_id, purchase_order_id, purchase_orders)
+> PurchaseOrders update_purchase_order(xero_tenant_id, purchase_order_id, purchase_orders, idempotency_key=idempotency_key)
 
 Updates a specific purchase order
 
@@ -14792,9 +15166,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 purchase_order_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Purchase Order
 purchase_orders = { "PurchaseOrders": [ { "AttentionTo": "Peter Parker", "LineItems": [], "Contact": {} } ] } # PurchaseOrders | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific purchase order
-    api_response = api_instance.update_purchase_order(xero_tenant_id, purchase_order_id, purchase_orders)
+    api_response = api_instance.update_purchase_order(xero_tenant_id, purchase_order_id, purchase_orders, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_purchase_order: %s\n" % e)
@@ -14807,6 +15182,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **purchase_order_id** | [**str**](.md)| Unique identifier for an Purchase Order | 
  **purchase_orders** | [**PurchaseOrders**](PurchaseOrders.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -14824,7 +15200,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_purchase_order_attachment_by_file_name**
-> Attachments update_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body)
+> Attachments update_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates a specific attachment for a specific purchase order by filename
 
@@ -14858,9 +15234,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 purchase_order_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Purchase Order
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific attachment for a specific purchase order by filename
-    api_response = api_instance.update_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body)
+    api_response = api_instance.update_purchase_order_attachment_by_file_name(xero_tenant_id, purchase_order_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_purchase_order_attachment_by_file_name: %s\n" % e)
@@ -14874,6 +15251,7 @@ Name | Type | Description  | Notes
  **purchase_order_id** | [**str**](.md)| Unique identifier for an Purchase Order | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -14891,7 +15269,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_quote**
-> Quotes update_quote(xero_tenant_id, quote_id, quotes)
+> Quotes update_quote(xero_tenant_id, quote_id, quotes, idempotency_key=idempotency_key)
 
 Updates a specific quote
 
@@ -14924,9 +15302,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 quote_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Quote
 quotes = { "Quotes": [ { "Reference": "I am an update", "Contact": { "ContactID": "00000000-0000-0000-0000-000000000000" }, "Date": "2020-02-01" } ] } # Quotes | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific quote
-    api_response = api_instance.update_quote(xero_tenant_id, quote_id, quotes)
+    api_response = api_instance.update_quote(xero_tenant_id, quote_id, quotes, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_quote: %s\n" % e)
@@ -14939,6 +15318,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **quote_id** | [**str**](.md)| Unique identifier for an Quote | 
  **quotes** | [**Quotes**](Quotes.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -14956,7 +15336,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_quote_attachment_by_file_name**
-> Attachments update_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body)
+> Attachments update_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates a specific attachment from a specific quote by filename
 
@@ -14990,9 +15370,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 quote_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for an Quote
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific attachment from a specific quote by filename
-    api_response = api_instance.update_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body)
+    api_response = api_instance.update_quote_attachment_by_file_name(xero_tenant_id, quote_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_quote_attachment_by_file_name: %s\n" % e)
@@ -15006,6 +15387,7 @@ Name | Type | Description  | Notes
  **quote_id** | [**str**](.md)| Unique identifier for an Quote | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -15023,7 +15405,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_receipt**
-> Receipts update_receipt(xero_tenant_id, receipt_id, receipts, unitdp=unitdp)
+> Receipts update_receipt(xero_tenant_id, receipt_id, receipts, idempotency_key=idempotency_key, unitdp=unitdp)
 
 Updates a specific draft expense claim receipts
 
@@ -15056,10 +15438,11 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 receipt_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Receipt
 receipts = { "Receipts": [ { "Lineitems": [], "User": { "UserID": "00000000-0000-0000-0000-000000000000" }, "Reference": "Foobar" } ] } # Receipts | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 unitdp = 4 # int | e.g. unitdp=4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts (optional)
 try:
     # Updates a specific draft expense claim receipts
-    api_response = api_instance.update_receipt(xero_tenant_id, receipt_id, receipts, unitdp=unitdp)
+    api_response = api_instance.update_receipt(xero_tenant_id, receipt_id, receipts, idempotency_key=idempotency_key, unitdp=unitdp)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_receipt: %s\n" % e)
@@ -15072,6 +15455,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **receipt_id** | [**str**](.md)| Unique identifier for a Receipt | 
  **receipts** | [**Receipts**](Receipts.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **unitdp** | **int**| e.g. unitdp&#x3D;4 – (Unit Decimal Places) You can opt in to use four decimal places for unit amounts | [optional] 
 
 ### Return type
@@ -15090,7 +15474,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_receipt_attachment_by_file_name**
-> Attachments update_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body)
+> Attachments update_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates a specific attachment on a specific expense claim receipts by file name
 
@@ -15124,9 +15508,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 receipt_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Receipt
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific attachment on a specific expense claim receipts by file name
-    api_response = api_instance.update_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body)
+    api_response = api_instance.update_receipt_attachment_by_file_name(xero_tenant_id, receipt_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_receipt_attachment_by_file_name: %s\n" % e)
@@ -15140,6 +15525,7 @@ Name | Type | Description  | Notes
  **receipt_id** | [**str**](.md)| Unique identifier for a Receipt | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -15157,7 +15543,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_repeating_invoice**
-> RepeatingInvoices update_repeating_invoice(xero_tenant_id, repeating_invoice_id, repeating_invoices)
+> RepeatingInvoices update_repeating_invoice(xero_tenant_id, repeating_invoice_id, repeating_invoices, idempotency_key=idempotency_key)
 
 Deletes a specific repeating invoice template
 
@@ -15190,9 +15576,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 repeating_invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Repeating Invoice
 repeating_invoices = { "Schedule": { "Period": 1, "Unit": "MONTHLY", "DueDate": 10, "DueDateType": "OFFOLLOWINGMONTH", "StartDate": "\/Date(1555286400000+0000)\/", "EndDate": "\/Date(1569801600000+0000)\/", "NextScheduledDate": "\/Date(1555286400000+0000)\/" }, "RepeatingInvoiceID": "428c0d75-909f-4b04-8403-a48dc27283b0", "Type": "ACCREC", "Reference": "[Week]", "HasAttachments": true, "ApprovedForSending": false, "SendCopy": false, "MarkAsSent": false, "IncludePDF": false, "ID": "428c0d75-909f-4b04-8403-a48dc27283b0", "Contact": { "ContactID": "430fa14a-f945-44d3-9f97-5df5e28441b8", "Name": "Liam Gallagher", "Addresses": [], "Phones": [], "ContactGroups": [], "ContactPersons": [], "HasValidationErrors": false }, "Status": "DELETED", "LineAmountTypes": "Exclusive", "LineItems": [ { "Description": "Guitars Fender Strat", "UnitAmount": 5000.00, "TaxType": "OUTPUT2", "TaxAmount": 750.00, "LineAmount": 5000.00, "AccountCode": "200", "Tracking": [], "Quantity": 1.0000, "LineItemID": "13a8353c-d2af-4d5b-920c-438449f08900", "DiscountEnteredAsPercent": true } ], "SubTotal": 5000.00, "TotalTax": 750.00, "Total": 5750.00, "CurrencyCode": "NZD" } # RepeatingInvoices | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Deletes a specific repeating invoice template
-    api_response = api_instance.update_repeating_invoice(xero_tenant_id, repeating_invoice_id, repeating_invoices)
+    api_response = api_instance.update_repeating_invoice(xero_tenant_id, repeating_invoice_id, repeating_invoices, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_repeating_invoice: %s\n" % e)
@@ -15205,6 +15592,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **repeating_invoice_id** | [**str**](.md)| Unique identifier for a Repeating Invoice | 
  **repeating_invoices** | [**RepeatingInvoices**](RepeatingInvoices.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -15222,7 +15610,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_repeating_invoice_attachment_by_file_name**
-> Attachments update_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body)
+> Attachments update_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body, idempotency_key=idempotency_key)
 
 Updates a specific attachment from a specific repeating invoices by file name
 
@@ -15256,9 +15644,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 repeating_invoice_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Repeating Invoice
 file_name = 'xero-dev.jpg' # str | Name of the attachment
 body = 'body_example' # str | Byte array of file in body of request
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific attachment from a specific repeating invoices by file name
-    api_response = api_instance.update_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body)
+    api_response = api_instance.update_repeating_invoice_attachment_by_file_name(xero_tenant_id, repeating_invoice_id, file_name, body, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_repeating_invoice_attachment_by_file_name: %s\n" % e)
@@ -15272,6 +15661,7 @@ Name | Type | Description  | Notes
  **repeating_invoice_id** | [**str**](.md)| Unique identifier for a Repeating Invoice | 
  **file_name** | **str**| Name of the attachment | 
  **body** | **str**| Byte array of file in body of request | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -15289,7 +15679,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_tax_rate**
-> TaxRates update_tax_rate(xero_tenant_id, tax_rates)
+> TaxRates update_tax_rate(xero_tenant_id, tax_rates, idempotency_key=idempotency_key)
 
 Updates tax rates
 
@@ -15321,9 +15711,10 @@ api_instance = AccountingApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 tax_rates = { "TaxRates": [ { "Name": "State Tax NY", "TaxComponents": [ { "Name": "State Tax", "Rate": 2.25 } ], "Status": "DELETED", "ReportTaxType": "INPUT" } ] } # TaxRates | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates tax rates
-    api_response = api_instance.update_tax_rate(xero_tenant_id, tax_rates)
+    api_response = api_instance.update_tax_rate(xero_tenant_id, tax_rates, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_tax_rate: %s\n" % e)
@@ -15335,6 +15726,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **tax_rates** | [**TaxRates**](TaxRates.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -15352,7 +15744,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_tracking_category**
-> TrackingCategories update_tracking_category(xero_tenant_id, tracking_category_id, tracking_category)
+> TrackingCategories update_tracking_category(xero_tenant_id, tracking_category_id, tracking_category, idempotency_key=idempotency_key)
 
 Updates a specific tracking category
 
@@ -15385,9 +15777,10 @@ api_instance = AccountingApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 tracking_category_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a TrackingCategory
 tracking_category = { "Name": "Avengers" } # TrackingCategory | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific tracking category
-    api_response = api_instance.update_tracking_category(xero_tenant_id, tracking_category_id, tracking_category)
+    api_response = api_instance.update_tracking_category(xero_tenant_id, tracking_category_id, tracking_category, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_tracking_category: %s\n" % e)
@@ -15400,6 +15793,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **tracking_category_id** | [**str**](.md)| Unique identifier for a TrackingCategory | 
  **tracking_category** | [**TrackingCategory**](TrackingCategory.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -15417,7 +15811,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_tracking_options**
-> TrackingOptions update_tracking_options(xero_tenant_id, tracking_category_id, tracking_option_id, tracking_option)
+> TrackingOptions update_tracking_options(xero_tenant_id, tracking_category_id, tracking_option_id, tracking_option, idempotency_key=idempotency_key)
 
 Updates a specific option for a specific tracking category
 
@@ -15451,9 +15845,10 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 tracking_category_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a TrackingCategory
 tracking_option_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for a Tracking Option
 tracking_option = { name: "Vision" } # TrackingOption | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific option for a specific tracking category
-    api_response = api_instance.update_tracking_options(xero_tenant_id, tracking_category_id, tracking_option_id, tracking_option)
+    api_response = api_instance.update_tracking_options(xero_tenant_id, tracking_category_id, tracking_option_id, tracking_option, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AccountingApi->update_tracking_options: %s\n" % e)
@@ -15467,6 +15862,7 @@ Name | Type | Description  | Notes
  **tracking_category_id** | [**str**](.md)| Unique identifier for a TrackingCategory | 
  **tracking_option_id** | [**str**](.md)| Unique identifier for a Tracking Option | 
  **tracking_option** | [**TrackingOption**](TrackingOption.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
diff --git a/xero_python/accounting/docs/Allocation.md b/xero_python/accounting/docs/Allocation.md
index d6b94be1..b5c0870b 100644
--- a/xero_python/accounting/docs/Allocation.md
+++ b/xero_python/accounting/docs/Allocation.md
@@ -3,12 +3,14 @@
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
+**allocation_id** | **str** | Xero generated unique identifier | [optional] 
 **invoice** | [**Invoice**](Invoice.md) |  | 
 **overpayment** | [**Overpayment**](Overpayment.md) |  | [optional] 
 **prepayment** | [**Prepayment**](Prepayment.md) |  | [optional] 
 **credit_note** | [**CreditNote**](CreditNote.md) |  | [optional] 
 **amount** | **float** | the amount being applied to the invoice | 
 **date** | **date** | the date the allocation is applied YYYY-MM-DD. | 
+**is_deleted** | **bool** | A flag that returns true when the allocation is succesfully deleted | [optional] 
 **status_attribute_string** | **str** | A string to indicate if a invoice status | [optional] 
 **validation_errors** | [**list[ValidationError]**](ValidationError.md) | Displays array of validation error messages from the API | [optional] 
 
diff --git a/xero_python/accounting/docs/Contact.md b/xero_python/accounting/docs/Contact.md
index 5f9a2bed..11bece92 100644
--- a/xero_python/accounting/docs/Contact.md
+++ b/xero_python/accounting/docs/Contact.md
@@ -13,7 +13,6 @@ Name | Type | Description | Notes
 **last_name** | **str** | Last name of contact person (max length &#x3D; 255) | [optional] 
 **company_number** | **str** | Company registration number (max length &#x3D; 50) | [optional] 
 **email_address** | **str** | Email address of contact person (umlauts not supported) (max length  &#x3D; 255) | [optional] 
-**skype_user_name** | **str** | Skype user name of contact | [optional] 
 **contact_persons** | [**list[ContactPerson]**](ContactPerson.md) | See contact persons | [optional] 
 **bank_account_details** | **str** | Bank account number of contact | [optional] 
 **tax_number** | **str** | Tax number of contact – this is also known as the ABN (Australia), GST Number (New Zealand), VAT Number (UK) or Tax ID Number (US and global) in the Xero UI depending on which regionalized version of Xero you are using (max length &#x3D; 50) | [optional] 
diff --git a/xero_python/accounting/docs/TenNinetyNineContact.md b/xero_python/accounting/docs/TenNinetyNineContact.md
index 1f366ca9..c819d556 100644
--- a/xero_python/accounting/docs/TenNinetyNineContact.md
+++ b/xero_python/accounting/docs/TenNinetyNineContact.md
@@ -25,6 +25,9 @@ Name | Type | Description | Notes
 **street_address** | **str** | Contact address on 1099 Form | [optional] 
 **tax_id** | **str** | Contact tax id on 1099 Form | [optional] 
 **contact_id** | **str** | Contact contact id | [optional] 
+**legal_name** | **str** | Contact legal name | [optional] 
+**business_name** | **str** | Contact business name | [optional] 
+**federal_tax_classification** | **str** | Contact federal tax classification | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/xero_python/accounting/models/account_type.py b/xero_python/accounting/models/account_type.py
index a98ef206..b02a1a02 100644
--- a/xero_python/accounting/models/account_type.py
+++ b/xero_python/accounting/models/account_type.py
@@ -41,8 +41,4 @@ class AccountType(Enum):
     REVENUE = "REVENUE"
     SALES = "SALES"
     TERMLIAB = "TERMLIAB"
-    PAYGLIABILITY = "PAYGLIABILITY"
     PAYG = "PAYG"
-    SUPERANNUATIONEXPENSE = "SUPERANNUATIONEXPENSE"
-    SUPERANNUATIONLIABILITY = "SUPERANNUATIONLIABILITY"
-    WAGESEXPENSE = "WAGESEXPENSE"
diff --git a/xero_python/accounting/models/allocation.py b/xero_python/accounting/models/allocation.py
index 200a6e7d..47c9c1a7 100644
--- a/xero_python/accounting/models/allocation.py
+++ b/xero_python/accounting/models/allocation.py
@@ -30,50 +30,60 @@ class Allocation(BaseModel):
                             and the value is json key in definition.
     """
     openapi_types = {
+        "allocation_id": "str",
         "invoice": "Invoice",
         "overpayment": "Overpayment",
         "prepayment": "Prepayment",
         "credit_note": "CreditNote",
         "amount": "float",
         "date": "date[ms-format]",
+        "is_deleted": "bool",
         "status_attribute_string": "str",
         "validation_errors": "list[ValidationError]",
     }
 
     attribute_map = {
+        "allocation_id": "AllocationID",
         "invoice": "Invoice",
         "overpayment": "Overpayment",
         "prepayment": "Prepayment",
         "credit_note": "CreditNote",
         "amount": "Amount",
         "date": "Date",
+        "is_deleted": "IsDeleted",
         "status_attribute_string": "StatusAttributeString",
         "validation_errors": "ValidationErrors",
     }
 
     def __init__(
         self,
+        allocation_id=None,
         invoice=None,
         overpayment=None,
         prepayment=None,
         credit_note=None,
         amount=None,
         date=None,
+        is_deleted=None,
         status_attribute_string=None,
         validation_errors=None,
     ):  # noqa: E501
         """Allocation - a model defined in OpenAPI"""  # noqa: E501
 
+        self._allocation_id = None
         self._invoice = None
         self._overpayment = None
         self._prepayment = None
         self._credit_note = None
         self._amount = None
         self._date = None
+        self._is_deleted = None
         self._status_attribute_string = None
         self._validation_errors = None
         self.discriminator = None
 
+        if allocation_id is not None:
+            self.allocation_id = allocation_id
         self.invoice = invoice
         if overpayment is not None:
             self.overpayment = overpayment
@@ -83,11 +93,36 @@ def __init__(
             self.credit_note = credit_note
         self.amount = amount
         self.date = date
+        if is_deleted is not None:
+            self.is_deleted = is_deleted
         if status_attribute_string is not None:
             self.status_attribute_string = status_attribute_string
         if validation_errors is not None:
             self.validation_errors = validation_errors
 
+    @property
+    def allocation_id(self):
+        """Gets the allocation_id of this Allocation.  # noqa: E501
+
+        Xero generated unique identifier  # noqa: E501
+
+        :return: The allocation_id of this Allocation.  # noqa: E501
+        :rtype: str
+        """
+        return self._allocation_id
+
+    @allocation_id.setter
+    def allocation_id(self, allocation_id):
+        """Sets the allocation_id of this Allocation.
+
+        Xero generated unique identifier  # noqa: E501
+
+        :param allocation_id: The allocation_id of this Allocation.  # noqa: E501
+        :type: str
+        """
+
+        self._allocation_id = allocation_id
+
     @property
     def invoice(self):
         """Gets the invoice of this Allocation.  # noqa: E501
@@ -230,6 +265,29 @@ def date(self, date):
 
         self._date = date
 
+    @property
+    def is_deleted(self):
+        """Gets the is_deleted of this Allocation.  # noqa: E501
+
+        A flag that returns true when the allocation is succesfully deleted  # noqa: E501
+
+        :return: The is_deleted of this Allocation.  # noqa: E501
+        :rtype: bool
+        """
+        return self._is_deleted
+
+    @is_deleted.setter
+    def is_deleted(self, is_deleted):
+        """Sets the is_deleted of this Allocation.
+
+        A flag that returns true when the allocation is succesfully deleted  # noqa: E501
+
+        :param is_deleted: The is_deleted of this Allocation.  # noqa: E501
+        :type: bool
+        """
+
+        self._is_deleted = is_deleted
+
     @property
     def status_attribute_string(self):
         """Gets the status_attribute_string of this Allocation.  # noqa: E501
diff --git a/xero_python/accounting/models/contact.py b/xero_python/accounting/models/contact.py
index a41d1e29..c42fcf73 100644
--- a/xero_python/accounting/models/contact.py
+++ b/xero_python/accounting/models/contact.py
@@ -40,7 +40,6 @@ class Contact(BaseModel):
         "last_name": "str",
         "company_number": "str",
         "email_address": "str",
-        "skype_user_name": "str",
         "contact_persons": "list[ContactPerson]",
         "bank_account_details": "str",
         "tax_number": "str",
@@ -86,7 +85,6 @@ class Contact(BaseModel):
         "last_name": "LastName",
         "company_number": "CompanyNumber",
         "email_address": "EmailAddress",
-        "skype_user_name": "SkypeUserName",
         "contact_persons": "ContactPersons",
         "bank_account_details": "BankAccountDetails",
         "tax_number": "TaxNumber",
@@ -133,7 +131,6 @@ def __init__(
         last_name=None,
         company_number=None,
         email_address=None,
-        skype_user_name=None,
         contact_persons=None,
         bank_account_details=None,
         tax_number=None,
@@ -179,7 +176,6 @@ def __init__(
         self._last_name = None
         self._company_number = None
         self._email_address = None
-        self._skype_user_name = None
         self._contact_persons = None
         self._bank_account_details = None
         self._tax_number = None
@@ -234,8 +230,6 @@ def __init__(
             self.company_number = company_number
         if email_address is not None:
             self.email_address = email_address
-        if skype_user_name is not None:
-            self.skype_user_name = skype_user_name
         if contact_persons is not None:
             self.contact_persons = contact_persons
         if bank_account_details is not None:
@@ -575,29 +569,6 @@ def email_address(self, email_address):
 
         self._email_address = email_address
 
-    @property
-    def skype_user_name(self):
-        """Gets the skype_user_name of this Contact.  # noqa: E501
-
-        Skype user name of contact  # noqa: E501
-
-        :return: The skype_user_name of this Contact.  # noqa: E501
-        :rtype: str
-        """
-        return self._skype_user_name
-
-    @skype_user_name.setter
-    def skype_user_name(self, skype_user_name):
-        """Sets the skype_user_name of this Contact.
-
-        Skype user name of contact  # noqa: E501
-
-        :param skype_user_name: The skype_user_name of this Contact.  # noqa: E501
-        :type: str
-        """
-
-        self._skype_user_name = skype_user_name
-
     @property
     def contact_persons(self):
         """Gets the contact_persons of this Contact.  # noqa: E501
diff --git a/xero_python/accounting/models/tax_type.py b/xero_python/accounting/models/tax_type.py
index dbf1c59a..453231cd 100644
--- a/xero_python/accounting/models/tax_type.py
+++ b/xero_python/accounting/models/tax_type.py
@@ -120,3 +120,27 @@ class TaxType(Enum):
     IMREY23 = "IMREY23"
     BADDEBTRECOVERY = "BADDEBTRECOVERY"
     BADDEBTRECOVERYY23 = "BADDEBTRECOVERYY23"
+    OUTPUTY24 = "OUTPUTY24"
+    DSOUTPUTY24 = "DSOUTPUTY24"
+    INPUTY24 = "INPUTY24"
+    IGDSINPUT2Y24 = "IGDSINPUT2Y24"
+    TXPETINPUTY24 = "TXPETINPUTY24"
+    TXESSINPUTY24 = "TXESSINPUTY24"
+    TXN33INPUTY24 = "TXN33INPUTY24"
+    TXREINPUTY24 = "TXREINPUTY24"
+    TXCAY24 = "TXCAY24"
+    BADDEBTRELIEFY24 = "BADDEBTRELIEFY24"
+    IGDSINPUT3Y24 = "IGDSINPUT3Y24"
+    SROVRRSY24 = "SROVRRSY24"
+    SROVRLVGY24 = "SROVRLVGY24"
+    SRLVGY24 = "SRLVGY24"
+    TXRCTSY24 = "TXRCTSY24"
+    TXRCESSY24 = "TXRCESSY24"
+    TXRCN33Y24 = "TXRCN33Y24"
+    TXRCREY24 = "TXRCREY24"
+    IMY24 = "IMY24"
+    IMESSY24 = "IMESSY24"
+    IMN33Y24 = "IMN33Y24"
+    IMREY24 = "IMREY24"
+    BADDEBTRECOVERYY24 = "BADDEBTRECOVERYY24"
+    OSOUTPUT2 = "OSOUTPUT2"
diff --git a/xero_python/accounting/models/ten_ninety_nine_contact.py b/xero_python/accounting/models/ten_ninety_nine_contact.py
index d01c81ca..15910317 100644
--- a/xero_python/accounting/models/ten_ninety_nine_contact.py
+++ b/xero_python/accounting/models/ten_ninety_nine_contact.py
@@ -52,6 +52,9 @@ class TenNinetyNineContact(BaseModel):
         "street_address": "str",
         "tax_id": "str",
         "contact_id": "str",
+        "legal_name": "str",
+        "business_name": "str",
+        "federal_tax_classification": "str",
     }
 
     attribute_map = {
@@ -77,6 +80,9 @@ class TenNinetyNineContact(BaseModel):
         "street_address": "StreetAddress",
         "tax_id": "TaxID",
         "contact_id": "ContactId",
+        "legal_name": "LegalName",
+        "business_name": "BusinessName",
+        "federal_tax_classification": "FederalTaxClassification",
     }
 
     def __init__(
@@ -103,6 +109,9 @@ def __init__(
         street_address=None,
         tax_id=None,
         contact_id=None,
+        legal_name=None,
+        business_name=None,
+        federal_tax_classification=None,
     ):  # noqa: E501
         """TenNinetyNineContact - a model defined in OpenAPI"""  # noqa: E501
 
@@ -128,6 +137,9 @@ def __init__(
         self._street_address = None
         self._tax_id = None
         self._contact_id = None
+        self._legal_name = None
+        self._business_name = None
+        self._federal_tax_classification = None
         self.discriminator = None
 
         if box1 is not None:
@@ -174,6 +186,12 @@ def __init__(
             self.tax_id = tax_id
         if contact_id is not None:
             self.contact_id = contact_id
+        if legal_name is not None:
+            self.legal_name = legal_name
+        if business_name is not None:
+            self.business_name = business_name
+        if federal_tax_classification is not None:
+            self.federal_tax_classification = federal_tax_classification
 
     @property
     def box1(self):
@@ -680,3 +698,90 @@ def contact_id(self, contact_id):
         """
 
         self._contact_id = contact_id
+
+    @property
+    def legal_name(self):
+        """Gets the legal_name of this TenNinetyNineContact.  # noqa: E501
+
+        Contact legal name  # noqa: E501
+
+        :return: The legal_name of this TenNinetyNineContact.  # noqa: E501
+        :rtype: str
+        """
+        return self._legal_name
+
+    @legal_name.setter
+    def legal_name(self, legal_name):
+        """Sets the legal_name of this TenNinetyNineContact.
+
+        Contact legal name  # noqa: E501
+
+        :param legal_name: The legal_name of this TenNinetyNineContact.  # noqa: E501
+        :type: str
+        """
+
+        self._legal_name = legal_name
+
+    @property
+    def business_name(self):
+        """Gets the business_name of this TenNinetyNineContact.  # noqa: E501
+
+        Contact business name  # noqa: E501
+
+        :return: The business_name of this TenNinetyNineContact.  # noqa: E501
+        :rtype: str
+        """
+        return self._business_name
+
+    @business_name.setter
+    def business_name(self, business_name):
+        """Sets the business_name of this TenNinetyNineContact.
+
+        Contact business name  # noqa: E501
+
+        :param business_name: The business_name of this TenNinetyNineContact.  # noqa: E501
+        :type: str
+        """
+
+        self._business_name = business_name
+
+    @property
+    def federal_tax_classification(self):
+        """Gets the federal_tax_classification of this TenNinetyNineContact.  # noqa: E501
+
+        Contact federal tax classification  # noqa: E501
+
+        :return: The federal_tax_classification of this TenNinetyNineContact.  # noqa: E501
+        :rtype: str
+        """
+        return self._federal_tax_classification
+
+    @federal_tax_classification.setter
+    def federal_tax_classification(self, federal_tax_classification):
+        """Sets the federal_tax_classification of this TenNinetyNineContact.
+
+        Contact federal tax classification  # noqa: E501
+
+        :param federal_tax_classification: The federal_tax_classification of this TenNinetyNineContact.  # noqa: E501
+        :type: str
+        """
+        allowed_values = [
+            "SOLE_PROPRIETOR",
+            "PARTNERSHIP",
+            "TRUST_OR_ESTATE",
+            "NONPROFIT",
+            "C_CORP",
+            "S_CORP",
+            "OTHER",
+            "None",
+        ]  # noqa: E501
+
+        if federal_tax_classification:
+            if federal_tax_classification not in allowed_values:
+                raise ValueError(
+                    "Invalid value for `federal_tax_classification` ({0}), must be one of {1}".format(  # noqa: E501
+                        federal_tax_classification, allowed_values
+                    )
+                )
+
+        self._federal_tax_classification = federal_tax_classification
diff --git a/xero_python/appstore/api/app_store_api.py b/xero_python/appstore/api/app_store_api.py
index f7965d0b..64dce0b9 100644
--- a/xero_python/appstore/api/app_store_api.py
+++ b/xero_python/appstore/api/app_store_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -193,6 +193,7 @@ def post_usage_records(
         subscription_id,
         subscription_item_id,
         create_usage_record,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -202,6 +203,7 @@ def post_usage_records(
         :param str subscription_id: Unique identifier for Subscription object (required)
         :param str subscription_item_id: The unique identifier of the subscriptionItem (required)
         :param CreateUsageRecord create_usage_record: Contains the quantity for the usage record to create (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -237,6 +239,9 @@ def post_usage_records(
 
         header_params = {}
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -284,6 +289,7 @@ def put_usage_records(
         subscription_item_id,
         usage_record_id,
         update_usage_record,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -294,6 +300,7 @@ def put_usage_records(
         :param str subscription_item_id: The unique identifier of the subscriptionItem (required)
         :param str usage_record_id: The unique identifier of the usage record (required)
         :param UpdateUsageRecord update_usage_record: Contains the quantity for the usage record to update (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -336,6 +343,9 @@ def put_usage_records(
 
         header_params = {}
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/appstore/docs/AppStoreApi.md b/xero_python/appstore/docs/AppStoreApi.md
index dcec7425..b245c476 100644
--- a/xero_python/appstore/docs/AppStoreApi.md
+++ b/xero_python/appstore/docs/AppStoreApi.md
@@ -133,7 +133,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **post_usage_records**
-> UsageRecord post_usage_records(subscription_id, subscription_item_id, create_usage_record)
+> UsageRecord post_usage_records(subscription_id, subscription_item_id, create_usage_record, idempotency_key=idempotency_key)
 
 Send metered usage belonging to this subscription and subscription item
 
@@ -166,9 +166,10 @@ api_instance = AppStoreApi(api_client)
 subscription_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Subscription object
 subscription_item_id = '00000000-0000-0000-0000-000000000000' # str | The unique identifier of the subscriptionItem
 create_usage_record = { "timestamp": "2022-01-21T13:01:00", "quantity": 10 } # CreateUsageRecord | Contains the quantity for the usage record to create
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Send metered usage belonging to this subscription and subscription item
-    api_response = api_instance.post_usage_records(subscription_id, subscription_item_id, create_usage_record)
+    api_response = api_instance.post_usage_records(subscription_id, subscription_item_id, create_usage_record, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AppStoreApi->post_usage_records: %s\n" % e)
@@ -181,6 +182,7 @@ Name | Type | Description  | Notes
  **subscription_id** | [**str**](.md)| Unique identifier for Subscription object | 
  **subscription_item_id** | [**str**](.md)| The unique identifier of the subscriptionItem | 
  **create_usage_record** | [**CreateUsageRecord**](CreateUsageRecord.md)| Contains the quantity for the usage record to create | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -198,7 +200,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **put_usage_records**
-> UsageRecord put_usage_records(subscription_id, subscription_item_id, usage_record_id, update_usage_record)
+> UsageRecord put_usage_records(subscription_id, subscription_item_id, usage_record_id, update_usage_record, idempotency_key=idempotency_key)
 
 Update and existing metered usage belonging to this subscription and subscription item
 
@@ -232,9 +234,10 @@ subscription_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifi
 subscription_item_id = '00000000-0000-0000-0000-000000000000' # str | The unique identifier of the subscriptionItem
 usage_record_id = '00000000-0000-0000-0000-000000000000' # str | The unique identifier of the usage record
 update_usage_record = { "quantity": 10 } # UpdateUsageRecord | Contains the quantity for the usage record to update
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Update and existing metered usage belonging to this subscription and subscription item
-    api_response = api_instance.put_usage_records(subscription_id, subscription_item_id, usage_record_id, update_usage_record)
+    api_response = api_instance.put_usage_records(subscription_id, subscription_item_id, usage_record_id, update_usage_record, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AppStoreApi->put_usage_records: %s\n" % e)
@@ -248,6 +251,7 @@ Name | Type | Description  | Notes
  **subscription_item_id** | [**str**](.md)| The unique identifier of the subscriptionItem | 
  **usage_record_id** | [**str**](.md)| The unique identifier of the usage record | 
  **update_usage_record** | [**UpdateUsageRecord**](UpdateUsageRecord.md)| Contains the quantity for the usage record to update | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
diff --git a/xero_python/assets/api/asset_api.py b/xero_python/assets/api/asset_api.py
index 9f014898..58695ff3 100644
--- a/xero_python/assets/api/asset_api.py
+++ b/xero_python/assets/api/asset_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def create_asset(
         self,
         xero_tenant_id,
         asset,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -69,6 +70,7 @@ def create_asset(
         Adds an asset to the system  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Asset asset: Fixed asset you are creating (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -96,6 +98,9 @@ def create_asset(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -138,6 +143,7 @@ def create_asset(
     def create_asset_type(
         self,
         xero_tenant_id,
+        idempotency_key=empty,
         asset_type=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -147,6 +153,7 @@ def create_asset_type(
         OAuth2 scope: assets
         Adds an fixed asset type to the system  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param AssetType asset_type: Asset type to add
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -170,6 +177,9 @@ def create_asset_type(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/assets/docs/AssetApi.md b/xero_python/assets/docs/AssetApi.md
index 92ca1eb6..9917be0a 100644
--- a/xero_python/assets/docs/AssetApi.md
+++ b/xero_python/assets/docs/AssetApi.md
@@ -13,7 +13,7 @@ Method | HTTP request | Description
 
 
 # **create_asset**
-> Asset create_asset(xero_tenant_id, asset)
+> Asset create_asset(xero_tenant_id, asset, idempotency_key=idempotency_key)
 
 adds a fixed asset
 
@@ -47,9 +47,10 @@ api_instance = AssetApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 asset = { "assetName":"Computer74863", "assetNumber":"123477544", "purchaseDate":"2020-01-01", "purchasePrice":100.0, "disposalPrice":23.23, "assetStatus":"Draft", "bookDepreciationSetting":{ "depreciationMethod":"StraightLine", "averagingMethod":"ActualDays", "depreciationRate":0.5, "depreciationCalculationMethod":"None" }, "bookDepreciationDetail":{ "currentCapitalGain":5.32, "currentGainLoss":3.88, "depreciationStartDate":"2020-01-02", "costLimit":100.0, "currentAccumDepreciationAmount":2.25 }, "AccountingBookValue":99.5 } # Asset | Fixed asset you are creating
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # adds a fixed asset
-    api_response = api_instance.create_asset(xero_tenant_id, asset)
+    api_response = api_instance.create_asset(xero_tenant_id, asset, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AssetApi->create_asset: %s\n" % e)
@@ -61,6 +62,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **asset** | [**Asset**](Asset.md)| Fixed asset you are creating | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -78,7 +80,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_asset_type**
-> AssetType create_asset_type(xero_tenant_id, asset_type=asset_type)
+> AssetType create_asset_type(xero_tenant_id, idempotency_key=idempotency_key, asset_type=asset_type)
 
 adds a fixed asset type
 
@@ -111,10 +113,11 @@ api_client = ApiClient(
 api_instance = AssetApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 asset_type = { "assetTypeName":"Machinery11004", "fixedAssetAccountId":"3d8d063a-c148-4bb8-8b3c-a5e2ad3b1e82", "depreciationExpenseAccountId":"d1602f69-f900-4616-8d34-90af393fa368", "accumulatedDepreciationAccountId":"9195cadd-8645-41e6-9f67-7bcd421defe8", "bookDepreciationSetting":{ "depreciationMethod":"DiminishingValue100", "averagingMethod":"ActualDays", "depreciationRate":0.05, "depreciationCalculationMethod":"None" } } # AssetType | Asset type to add (optional)
 try:
     # adds a fixed asset type
-    api_response = api_instance.create_asset_type(xero_tenant_id, asset_type=asset_type)
+    api_response = api_instance.create_asset_type(xero_tenant_id, idempotency_key=idempotency_key, asset_type=asset_type)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AssetApi->create_asset_type: %s\n" % e)
@@ -125,6 +128,7 @@ except ApiException as e:
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **asset_type** | [**AssetType**](AssetType.md)| Asset type to add | [optional] 
 
 ### Return type
diff --git a/xero_python/docs/README.md b/xero_python/docs/README.md
index 22263ea5..0cca7401 100644
--- a/xero_python/docs/README.md
+++ b/xero_python/docs/README.md
@@ -3,8 +3,8 @@ These endpoints are related to managing authentication tokens and identity for X
 
 The `xero_python` package is automatically generated by the [XeroAPI SDK 2.0 Codegen](https://github.com/xero-github/xeroapi-sdk-codegen) project:
 
-- API version: 2.38.0
-- Package version: 1.25.0
+- API version: 2.40.1
+- Package version: 1.26.0
 - Build package: org.openapitools.codegen.languages.PythonClientCodegen
 For more information, please visit [https://developer.xero.com](https://developer.xero.com)
 
diff --git a/xero_python/file/api/files_api.py b/xero_python/file/api/files_api.py
index 8bc7b0a5..b567651b 100644
--- a/xero_python/file/api/files_api.py
+++ b/xero_python/file/api/files_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def create_file_association(
         self,
         xero_tenant_id,
         file_id,
+        idempotency_key=empty,
         association=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -70,6 +71,7 @@ def create_file_association(
         By passing in the appropriate options, you can create a new folder  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str file_id: File id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param Association association:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -101,6 +103,9 @@ def create_file_association(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -143,6 +148,7 @@ def create_file_association(
     def create_folder(
         self,
         xero_tenant_id,
+        idempotency_key=empty,
         folder=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -152,6 +158,7 @@ def create_folder(
         OAuth2 scope: files
         By passing in the appropriate properties, you can create a new folder  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param Folder folder:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -175,6 +182,9 @@ def create_folder(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -442,6 +452,10 @@ def get_associations_by_object(
         self,
         xero_tenant_id,
         object_id,
+        pagesize=empty,
+        page=empty,
+        sort=empty,
+        direction=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -451,6 +465,10 @@ def get_associations_by_object(
         By passing in the appropriate options, you can retrieve an association  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str object_id: Object id for single object (required)
+        :param int pagesize: pass an optional page size value
+        :param int page: number of records to skip for pagination
+        :param str sort: values to sort by
+        :param str direction: direction to sort by
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -470,6 +488,20 @@ def get_associations_by_object(
                 "when calling `get_associations_by_object`"
             )
 
+        if pagesize is not empty and pagesize > 100:
+            raise ValueError(
+                "Invalid value for parameter `pagesize` "
+                "when calling `get_associations_by_object`, must be a value "
+                "less than or equal to "
+                "`100`"
+            )
+        if page is not empty and page < 1:
+            raise ValueError(
+                "Invalid value for parameter `page` "
+                "when calling `get_associations_by_object`, must be a value "
+                "greater than or equal to "
+                "`1`"
+            )
         collection_formats = {}
         path_params = {
             "ObjectId": object_id,
@@ -477,6 +509,18 @@ def get_associations_by_object(
 
         query_params = []
 
+        if pagesize is not empty:
+            query_params.append(("pagesize", pagesize))
+
+        if page is not empty:
+            query_params.append(("page", page))
+
+        if sort is not empty:
+            query_params.append(("sort", sort))
+
+        if direction is not empty:
+            query_params.append(("direction", direction))
+
         header_params = {
             "xero-tenant-id": xero_tenant_id,
         }
@@ -1138,6 +1182,7 @@ def update_file(
         self,
         xero_tenant_id,
         file_id,
+        idempotency_key=empty,
         file_object=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1148,6 +1193,7 @@ def update_file(
         Updates file properties of a single file  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str file_id: File id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param FileObject file_object:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -1178,6 +1224,9 @@ def update_file(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1222,6 +1271,7 @@ def update_folder(
         xero_tenant_id,
         folder_id,
         folder,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1232,6 +1282,7 @@ def update_folder(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str folder_id: Folder id for single object (required)
         :param Folder folder: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1268,6 +1319,9 @@ def update_folder(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1313,6 +1367,7 @@ def upload_file(
         body,
         name,
         filename,
+        idempotency_key=empty,
         mime_type=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1324,6 +1379,7 @@ def upload_file(
         :param str body: (required)
         :param str name: exact name of the file you are uploading (required)
         :param str filename: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param str mime_type:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -1363,6 +1419,9 @@ def upload_file(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = [
             ("body", body),
@@ -1415,6 +1474,7 @@ def upload_file_to_folder(
         body,
         name,
         filename,
+        idempotency_key=empty,
         mime_type=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -1427,6 +1487,7 @@ def upload_file_to_folder(
         :param str body: (required)
         :param str name: exact name of the file you are uploading (required)
         :param str filename: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param str mime_type:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -1476,6 +1537,9 @@ def upload_file_to_folder(
             "xero-tenant-id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = [
             ("body", body),
diff --git a/xero_python/file/docs/FilesApi.md b/xero_python/file/docs/FilesApi.md
index 5e764f75..e0a1d854 100644
--- a/xero_python/file/docs/FilesApi.md
+++ b/xero_python/file/docs/FilesApi.md
@@ -25,7 +25,7 @@ Method | HTTP request | Description
 
 
 # **create_file_association**
-> Association create_file_association(xero_tenant_id, file_id, association=association)
+> Association create_file_association(xero_tenant_id, file_id, idempotency_key=idempotency_key, association=association)
 
 Creates a new file association
 
@@ -59,10 +59,11 @@ api_instance = FilesApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 file_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | File id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 association = { "ObjectId": "1270bf7c-5d18-473a-9231-1e36c4bd33ed", "ObjectGroup": "Contact", "ObjectType": "Business" } # Association |  (optional)
 try:
     # Creates a new file association
-    api_response = api_instance.create_file_association(xero_tenant_id, file_id, association=association)
+    api_response = api_instance.create_file_association(xero_tenant_id, file_id, idempotency_key=idempotency_key, association=association)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->create_file_association: %s\n" % e)
@@ -74,6 +75,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **file_id** | [**str**](.md)| File id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **association** | [**Association**](Association.md)|  | [optional] 
 
 ### Return type
@@ -92,7 +94,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_folder**
-> Folder create_folder(xero_tenant_id, folder=folder)
+> Folder create_folder(xero_tenant_id, idempotency_key=idempotency_key, folder=folder)
 
 Creates a new folder
 
@@ -125,10 +127,11 @@ api_client = ApiClient(
 api_instance = FilesApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 folder = { "Name": "My Docs" } # Folder |  (optional)
 try:
     # Creates a new folder
-    api_response = api_instance.create_folder(xero_tenant_id, folder=folder)
+    api_response = api_instance.create_folder(xero_tenant_id, idempotency_key=idempotency_key, folder=folder)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->create_folder: %s\n" % e)
@@ -139,6 +142,7 @@ except ApiException as e:
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **folder** | [**Folder**](Folder.md)|  | [optional] 
 
 ### Return type
@@ -351,7 +355,7 @@ void (empty response body)
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **get_associations_by_object**
-> list[Association] get_associations_by_object(xero_tenant_id, object_id)
+> list[Association] get_associations_by_object(xero_tenant_id, object_id, pagesize=pagesize, page=page, sort=sort, direction=direction)
 
 Retrieves an association object using a unique object ID
 
@@ -385,9 +389,13 @@ api_instance = FilesApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 object_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Object id for single object
+pagesize = 50 # int | pass an optional page size value (optional)
+page = 2 # int | number of records to skip for pagination (optional)
+sort = 'Associations/{ObjectId}?sort=CreatedDateUtc' # str | values to sort by (optional)
+direction = 'Associations/{ObjectId}?sort=CreatedDateUtc&direction=DESC' # str | direction to sort by (optional)
 try:
     # Retrieves an association object using a unique object ID
-    api_response = api_instance.get_associations_by_object(xero_tenant_id, object_id)
+    api_response = api_instance.get_associations_by_object(xero_tenant_id, object_id, pagesize=pagesize, page=page, sort=sort, direction=direction)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->get_associations_by_object: %s\n" % e)
@@ -399,6 +407,10 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **object_id** | [**str**](.md)| Object id for single object | 
+ **pagesize** | **int**| pass an optional page size value | [optional] 
+ **page** | **int**| number of records to skip for pagination | [optional] 
+ **sort** | **str**| values to sort by | [optional] 
+ **direction** | **str**| direction to sort by | [optional] 
 
 ### Return type
 
@@ -934,7 +946,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_file**
-> FileObject update_file(xero_tenant_id, file_id, file_object=file_object)
+> FileObject update_file(xero_tenant_id, file_id, idempotency_key=idempotency_key, file_object=file_object)
 
 Update a file
 
@@ -968,10 +980,11 @@ api_instance = FilesApi(api_client)
 
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 file_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | File id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 file_object = { "FolderId": "bf924975-7097-46f2-a143-1ecfbab3c8c3" } # FileObject |  (optional)
 try:
     # Update a file
-    api_response = api_instance.update_file(xero_tenant_id, file_id, file_object=file_object)
+    api_response = api_instance.update_file(xero_tenant_id, file_id, idempotency_key=idempotency_key, file_object=file_object)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->update_file: %s\n" % e)
@@ -983,6 +996,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **file_id** | [**str**](.md)| File id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **file_object** | [**FileObject**](FileObject.md)|  | [optional] 
 
 ### Return type
@@ -1001,7 +1015,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_folder**
-> Folder update_folder(xero_tenant_id, folder_id, folder)
+> Folder update_folder(xero_tenant_id, folder_id, folder, idempotency_key=idempotency_key)
 
 Updates an existing folder
 
@@ -1036,9 +1050,10 @@ api_instance = FilesApi(api_client)
 xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 folder_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Folder id for single object
 folder = { "Name": "Your Docs" } # Folder | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates an existing folder
-    api_response = api_instance.update_folder(xero_tenant_id, folder_id, folder)
+    api_response = api_instance.update_folder(xero_tenant_id, folder_id, folder, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->update_folder: %s\n" % e)
@@ -1051,6 +1066,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **folder_id** | [**str**](.md)| Folder id for single object | 
  **folder** | [**Folder**](Folder.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1068,7 +1084,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **upload_file**
-> FileObject upload_file(xero_tenant_id, body, name, filename, mime_type=mime_type)
+> FileObject upload_file(xero_tenant_id, body, name, filename, idempotency_key=idempotency_key, mime_type=mime_type)
 
 Uploads a File to the inbox
 
@@ -1102,10 +1118,11 @@ xero_tenant_id = 'YOUR_XERO_TENANT_ID' # str | Xero identifier for Tenant
 body = 'body_example' # str | 
 name = 'name_example' # str | exact name of the file you are uploading
 filename = 'filename_example' # str | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 mime_type = 'mime_type_example' # str |  (optional)
 try:
     # Uploads a File to the inbox
-    api_response = api_instance.upload_file(xero_tenant_id, body, name, filename, mime_type=mime_type)
+    api_response = api_instance.upload_file(xero_tenant_id, body, name, filename, idempotency_key=idempotency_key, mime_type=mime_type)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->upload_file: %s\n" % e)
@@ -1119,6 +1136,7 @@ Name | Type | Description  | Notes
  **body** | **str**|  | 
  **name** | **str**| exact name of the file you are uploading | 
  **filename** | **str**|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **mime_type** | **str**|  | [optional] 
 
 ### Return type
@@ -1137,7 +1155,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **upload_file_to_folder**
-> FileObject upload_file_to_folder(xero_tenant_id, folder_id, body, name, filename, mime_type=mime_type)
+> FileObject upload_file_to_folder(xero_tenant_id, folder_id, body, name, filename, idempotency_key=idempotency_key, mime_type=mime_type)
 
 Uploads a File to a specific folder
 
@@ -1172,10 +1190,11 @@ folder_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | pass required folder
 body = 'body_example' # str | 
 name = 'name_example' # str | exact name of the file you are uploading
 filename = 'filename_example' # str | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 mime_type = 'mime_type_example' # str |  (optional)
 try:
     # Uploads a File to a specific folder
-    api_response = api_instance.upload_file_to_folder(xero_tenant_id, folder_id, body, name, filename, mime_type=mime_type)
+    api_response = api_instance.upload_file_to_folder(xero_tenant_id, folder_id, body, name, filename, idempotency_key=idempotency_key, mime_type=mime_type)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FilesApi->upload_file_to_folder: %s\n" % e)
@@ -1190,6 +1209,7 @@ Name | Type | Description  | Notes
  **body** | **str**|  | 
  **name** | **str**| exact name of the file you are uploading | 
  **filename** | **str**|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **mime_type** | **str**|  | [optional] 
 
 ### Return type
diff --git a/xero_python/finance/api/finance_api.py b/xero_python/finance/api/finance_api.py
index 1d769a91..be5318da 100644
--- a/xero_python/finance/api/finance_api.py
+++ b/xero_python/finance/api/finance_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
diff --git a/xero_python/finance/models/problem_type.py b/xero_python/finance/models/problem_type.py
index da37dac4..38059de1 100644
--- a/xero_python/finance/models/problem_type.py
+++ b/xero_python/finance/models/problem_type.py
@@ -34,3 +34,4 @@ class ProblemType(Enum):
     REQUEST_TIMEOUT = "request-timeout"
     SERVICE_UNAVAILABLE = "service-unavailable"
     UNAUTHORIZED = "unauthorized"
+    RATE_LIMIT_ERROR = "rate-limit-error"
diff --git a/xero_python/identity/api/identity_api.py b/xero_python/identity/api/identity_api.py
index 5ba397a5..5e6c0023 100644
--- a/xero_python/identity/api/identity_api.py
+++ b/xero_python/identity/api/identity_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
diff --git a/xero_python/payrollau/api/payroll_au_api.py b/xero_python/payrollau/api/payroll_au_api.py
index b22114b3..b25b0946 100644
--- a/xero_python/payrollau/api/payroll_au_api.py
+++ b/xero_python/payrollau/api/payroll_au_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def approve_leave_application(
         self,
         xero_tenant_id,
         leave_application_id,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -68,6 +69,7 @@ def approve_leave_application(
         OAuth2 scope: payroll.employees
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str leave_application_id: Leave Application id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -98,6 +100,9 @@ def approve_leave_application(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -136,6 +141,7 @@ def create_employee(
         self,
         xero_tenant_id,
         employee,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -144,6 +150,7 @@ def create_employee(
         OAuth2 scope: payroll.employees
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param list[Employee] employee: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -172,6 +179,9 @@ def create_employee(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -215,6 +225,7 @@ def create_leave_application(
         self,
         xero_tenant_id,
         leave_application,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -223,6 +234,7 @@ def create_leave_application(
         OAuth2 scope: payroll.employees
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param list[LeaveApplication] leave_application: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -251,6 +263,9 @@ def create_leave_application(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -294,6 +309,7 @@ def create_pay_item(
         self,
         xero_tenant_id,
         pay_item,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -302,6 +318,7 @@ def create_pay_item(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PayItem pay_item: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -330,6 +347,9 @@ def create_pay_item(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -373,6 +393,7 @@ def create_pay_run(
         self,
         xero_tenant_id,
         pay_run,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -381,6 +402,7 @@ def create_pay_run(
         OAuth2 scope: payroll.payruns
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param list[PayRun] pay_run: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -409,6 +431,9 @@ def create_pay_run(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -452,6 +477,7 @@ def create_payroll_calendar(
         self,
         xero_tenant_id,
         payroll_calendar,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -460,6 +486,7 @@ def create_payroll_calendar(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param list[PayrollCalendar] payroll_calendar: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -488,6 +515,9 @@ def create_payroll_calendar(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -531,6 +561,7 @@ def create_superfund(
         self,
         xero_tenant_id,
         super_fund,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -539,6 +570,7 @@ def create_superfund(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param list[SuperFund] super_fund: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -567,6 +599,9 @@ def create_superfund(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -610,6 +645,7 @@ def create_timesheet(
         self,
         xero_tenant_id,
         timesheet,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -618,6 +654,7 @@ def create_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param list[Timesheet] timesheet: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -646,6 +683,9 @@ def create_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2051,6 +2091,7 @@ def reject_leave_application(
         self,
         xero_tenant_id,
         leave_application_id,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2059,6 +2100,7 @@ def reject_leave_application(
         OAuth2 scope: payroll.employees
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str leave_application_id: Leave Application id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2089,6 +2131,9 @@ def reject_leave_application(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2127,6 +2172,7 @@ def update_employee(
         self,
         xero_tenant_id,
         employee_id,
+        idempotency_key=empty,
         employee=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2137,6 +2183,7 @@ def update_employee(
         Update properties on a single employee  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param list[Employee] employee:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2168,6 +2215,9 @@ def update_employee(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2212,6 +2262,7 @@ def update_leave_application(
         xero_tenant_id,
         leave_application_id,
         leave_application,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -2221,6 +2272,7 @@ def update_leave_application(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str leave_application_id: Leave Application id for single object (required)
         :param list[LeaveApplication] leave_application: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -2257,6 +2309,9 @@ def update_leave_application(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2300,6 +2355,7 @@ def update_pay_run(
         self,
         xero_tenant_id,
         pay_run_id,
+        idempotency_key=empty,
         pay_run=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2310,6 +2366,7 @@ def update_pay_run(
         Update properties on a single PayRun  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str pay_run_id: PayRun id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param list[PayRun] pay_run:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2341,6 +2398,9 @@ def update_pay_run(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2384,6 +2444,7 @@ def update_payslip(
         self,
         xero_tenant_id,
         payslip_id,
+        idempotency_key=empty,
         payslip_lines=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2394,6 +2455,7 @@ def update_payslip(
         Update lines on a single payslips  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str payslip_id: Payslip id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param list[PayslipLines] payslip_lines:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2425,6 +2487,9 @@ def update_payslip(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2468,6 +2533,7 @@ def update_superfund(
         self,
         xero_tenant_id,
         super_fund_id,
+        idempotency_key=empty,
         super_fund=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2478,6 +2544,7 @@ def update_superfund(
         Update properties on a single Superfund  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str super_fund_id: Superfund id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param list[SuperFund] super_fund:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2509,6 +2576,9 @@ def update_superfund(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -2552,6 +2622,7 @@ def update_timesheet(
         self,
         xero_tenant_id,
         timesheet_id,
+        idempotency_key=empty,
         timesheet=empty,
         _return_http_data_only=True,
         _preload_content=True,
@@ -2562,6 +2633,7 @@ def update_timesheet(
         Update properties on a single timesheet  # noqa: E501
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Timesheet id for single object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param list[Timesheet] timesheet:
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
@@ -2593,6 +2665,9 @@ def update_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/payrollau/docs/PayrollAuApi.md b/xero_python/payrollau/docs/PayrollAuApi.md
index a7443b27..5c6c25ee 100644
--- a/xero_python/payrollau/docs/PayrollAuApi.md
+++ b/xero_python/payrollau/docs/PayrollAuApi.md
@@ -39,7 +39,7 @@ Method | HTTP request | Description
 
 
 # **approve_leave_application**
-> LeaveApplications approve_leave_application(xero_tenant_id, leave_application_id)
+> LeaveApplications approve_leave_application(xero_tenant_id, leave_application_id, idempotency_key=idempotency_key)
 
 Approve a requested leave application by a unique leave application id
 
@@ -71,9 +71,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 leave_application_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Leave Application id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Approve a requested leave application by a unique leave application id
-    api_response = api_instance.approve_leave_application(xero_tenant_id, leave_application_id)
+    api_response = api_instance.approve_leave_application(xero_tenant_id, leave_application_id, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->approve_leave_application: %s\n" % e)
@@ -85,6 +86,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **leave_application_id** | [**str**](.md)| Leave Application id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -102,7 +104,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee**
-> Employees create_employee(xero_tenant_id, employee)
+> Employees create_employee(xero_tenant_id, employee, idempotency_key=idempotency_key)
 
 Creates a payroll employee
 
@@ -134,9 +136,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee = [ { "FirstName": "Albus", "LastName": "Dumbledore", "DateOfBirth": "/Date(321523200000+0000)/", "HomeAddress": { "AddressLine1": "101 Green St", "City": "Island Bay", "Region": "NSW", "PostalCode": "6023", "Country": "AUSTRALIA" }, "StartDate": "/Date(321523200000+0000)/", "MiddleNames": "Percival", "Email": "albus39608@hogwarts.edu", "Gender": "M", "Phone": "444-2323", "Mobile": "555-1212", "IsAuthorisedToApproveLeave": true, "IsAuthorisedToApproveTimesheets": true, "JobTitle": "Regional Manager", "Classification": "corporate", "OrdinaryEarningsRateID": "ab874dfb-ab09-4c91-954e-43acf6fc23b4", "Status": "ACTIVE" } ] # list[Employee] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a payroll employee
-    api_response = api_instance.create_employee(xero_tenant_id, employee)
+    api_response = api_instance.create_employee(xero_tenant_id, employee, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_employee: %s\n" % e)
@@ -148,6 +151,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee** | [**list[Employee]**](Employee.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -165,7 +169,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_leave_application**
-> LeaveApplications create_leave_application(xero_tenant_id, leave_application)
+> LeaveApplications create_leave_application(xero_tenant_id, leave_application, idempotency_key=idempotency_key)
 
 Creates a leave application
 
@@ -197,9 +201,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 leave_application = [ { "EmployeeID": "cdfb8371-0b21-4b8a-8903-1024df6c391e", "LeaveTypeID": "184ea8f7-d143-46dd-bef3-0c60e1aa6fca", "Title": "Hello World", "StartDate": "/Date(1572559200000+0000)/", "EndDate": "/Date(1572645600000+0000)/" } ] # list[LeaveApplication] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a leave application
-    api_response = api_instance.create_leave_application(xero_tenant_id, leave_application)
+    api_response = api_instance.create_leave_application(xero_tenant_id, leave_application, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_leave_application: %s\n" % e)
@@ -211,6 +216,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **leave_application** | [**list[LeaveApplication]**](LeaveApplication.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -228,7 +234,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_pay_item**
-> PayItems create_pay_item(xero_tenant_id, pay_item)
+> PayItems create_pay_item(xero_tenant_id, pay_item, idempotency_key=idempotency_key)
 
 Creates a pay item
 
@@ -260,9 +266,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_item = { "EarningsRates": [ { "Name": "MyRate", "AccountCode": "400", "TypeOfUnits": "4.00", "IsExemptFromTax": true, "IsExemptFromSuper": true, "IsReportableAsW1": false, "AllowanceContributesToAnnualLeaveRate": false, "AllowanceContributesToOvertimeRate": false, "EarningsType": "ORDINARYTIMEEARNINGS", "EarningsRateID": "1fa4e226-b711-46ba-a8a7-4344c9c5fb87", "RateType": "MULTIPLE", "RatePerUnit": "10.0", "Multiplier": 1.5, "Amount": 5, "EmploymentTerminationPaymentType": "O" } ] } # PayItem | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a pay item
-    api_response = api_instance.create_pay_item(xero_tenant_id, pay_item)
+    api_response = api_instance.create_pay_item(xero_tenant_id, pay_item, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_pay_item: %s\n" % e)
@@ -274,6 +281,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_item** | [**PayItem**](PayItem.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -291,7 +299,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_pay_run**
-> PayRuns create_pay_run(xero_tenant_id, pay_run)
+> PayRuns create_pay_run(xero_tenant_id, pay_run, idempotency_key=idempotency_key)
 
 Creates a pay run
 
@@ -323,9 +331,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run = [ { "PayrollCalendarID": "78bb86b9-e1ea-47ac-b75d-f087a81931de", "PayRunPeriodStartDate": "/Date(1572566400000+0000)/", "PayRunPeriodEndDate": "/Date(1573084800000+0000)/", "PayRunStatus": "DRAFT", "PaymentDate": "/Date(1573171200000+0000)/" } ] # list[PayRun] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a pay run
-    api_response = api_instance.create_pay_run(xero_tenant_id, pay_run)
+    api_response = api_instance.create_pay_run(xero_tenant_id, pay_run, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_pay_run: %s\n" % e)
@@ -337,6 +346,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run** | [**list[PayRun]**](PayRun.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -354,7 +364,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_payroll_calendar**
-> PayrollCalendars create_payroll_calendar(xero_tenant_id, payroll_calendar)
+> PayrollCalendars create_payroll_calendar(xero_tenant_id, payroll_calendar, idempotency_key=idempotency_key)
 
 Creates a Payroll Calendar
 
@@ -386,9 +396,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 payroll_calendar = [ { "PayrollCalendarID":"78bb86b9-e1ea-47ac-b75d-f087a81931de", "PayRunPeriodStartDate":"/Date(1572566400000+0000)/", "PayRunPeriodEndDate":"/Date(1573084800000+0000)/", "PayRunStatus":"DRAFT", "PaymentDate":"/Date(1573171200000+0000)/" } ] # list[PayrollCalendar] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a Payroll Calendar
-    api_response = api_instance.create_payroll_calendar(xero_tenant_id, payroll_calendar)
+    api_response = api_instance.create_payroll_calendar(xero_tenant_id, payroll_calendar, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_payroll_calendar: %s\n" % e)
@@ -400,6 +411,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payroll_calendar** | [**list[PayrollCalendar]**](PayrollCalendar.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -417,7 +429,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_superfund**
-> SuperFunds create_superfund(xero_tenant_id, super_fund)
+> SuperFunds create_superfund(xero_tenant_id, super_fund, idempotency_key=idempotency_key)
 
 Creates a superfund
 
@@ -449,9 +461,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 super_fund = [ { "usi":"PTC0133AU", "Type":"REGULATED", "Name":"Bar99359", "AccountNumber":"FB36350", "AccountName":"Foo38428", "USI":"PTC0133AU" } ] # list[SuperFund] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a superfund
-    api_response = api_instance.create_superfund(xero_tenant_id, super_fund)
+    api_response = api_instance.create_superfund(xero_tenant_id, super_fund, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_superfund: %s\n" % e)
@@ -463,6 +476,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **super_fund** | [**list[SuperFund]**](SuperFund.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -480,7 +494,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_timesheet**
-> Timesheets create_timesheet(xero_tenant_id, timesheet)
+> Timesheets create_timesheet(xero_tenant_id, timesheet, idempotency_key=idempotency_key)
 
 Creates a timesheet
 
@@ -512,9 +526,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet = [ { "EmployeeID":"b34e89ff-770d-4099-b7e5-f968767118bc", "StartDate":"/Date(1573171200000+0000)/", "EndDate":"/Date(1573689600000+0000)/", "Status":"DRAFT", "TimesheetLines":[ { "EarningsRateID":"ab874dfb-ab09-4c91-954e-43acf6fc23b4", "TrackingItemID":"af5e9ce2-2349-4136-be99-3561b189f473", "NumberOfUnits":[ 2.0, 10.0, 0.0, 0.0, 5.0, 0.0, 5.0 ] } ] } ] # list[Timesheet] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a timesheet
-    api_response = api_instance.create_timesheet(xero_tenant_id, timesheet)
+    api_response = api_instance.create_timesheet(xero_tenant_id, timesheet, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->create_timesheet: %s\n" % e)
@@ -526,6 +541,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet** | [**list[Timesheet]**](Timesheet.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1662,7 +1678,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **reject_leave_application**
-> LeaveApplications reject_leave_application(xero_tenant_id, leave_application_id)
+> LeaveApplications reject_leave_application(xero_tenant_id, leave_application_id, idempotency_key=idempotency_key)
 
 Reject a leave application by a unique leave application id
 
@@ -1694,9 +1710,10 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 leave_application_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Leave Application id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Reject a leave application by a unique leave application id
-    api_response = api_instance.reject_leave_application(xero_tenant_id, leave_application_id)
+    api_response = api_instance.reject_leave_application(xero_tenant_id, leave_application_id, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->reject_leave_application: %s\n" % e)
@@ -1708,6 +1725,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **leave_application_id** | [**str**](.md)| Leave Application id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1725,7 +1743,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee**
-> Employees update_employee(xero_tenant_id, employee_id, employee=employee)
+> Employees update_employee(xero_tenant_id, employee_id, idempotency_key=idempotency_key, employee=employee)
 
 Updates an employee's detail
 
@@ -1759,10 +1777,11 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 employee = [ { "MiddleNames": "Frank" } ] # list[Employee] |  (optional)
 try:
     # Updates an employee's detail
-    api_response = api_instance.update_employee(xero_tenant_id, employee_id, employee=employee)
+    api_response = api_instance.update_employee(xero_tenant_id, employee_id, idempotency_key=idempotency_key, employee=employee)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->update_employee: %s\n" % e)
@@ -1774,6 +1793,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **employee** | [**list[Employee]**](Employee.md)|  | [optional] 
 
 ### Return type
@@ -1792,7 +1812,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_leave_application**
-> LeaveApplications update_leave_application(xero_tenant_id, leave_application_id, leave_application)
+> LeaveApplications update_leave_application(xero_tenant_id, leave_application_id, leave_application, idempotency_key=idempotency_key)
 
 Updates a specific leave application
 
@@ -1825,9 +1845,10 @@ api_instance = PayrollAuApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 leave_application_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Leave Application id for single object
 leave_application = [ { "EmployeeID": "cdfb8371-0b21-4b8a-8903-1024df6c391e", "LeaveApplicationID": "1d4cd583-0107-4386-936b-672eb3d1f624", "LeaveTypeID": "184ea8f7-d143-46dd-bef3-0c60e1aa6fca", "LeavePeriods": [ { "PayPeriodStartDate": "/Date(1572566400000+0000)/", "PayPeriodEndDate": "/Date(1573084800000+0000)/", "LeavePeriodStatus": "SCHEDULED", "NumberOfUnits": 7.6 } ], "Title": "vacation", "Description": "My updated Description", "StartDate": "/Date(1572559200000+0000)/", "EndDate": "/Date(1572645600000+0000)/", "PayOutType": "DEFAULT" } ] # list[LeaveApplication] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific leave application
-    api_response = api_instance.update_leave_application(xero_tenant_id, leave_application_id, leave_application)
+    api_response = api_instance.update_leave_application(xero_tenant_id, leave_application_id, leave_application, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->update_leave_application: %s\n" % e)
@@ -1840,6 +1861,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **leave_application_id** | [**str**](.md)| Leave Application id for single object | 
  **leave_application** | [**list[LeaveApplication]**](LeaveApplication.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1857,7 +1879,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_pay_run**
-> PayRuns update_pay_run(xero_tenant_id, pay_run_id, pay_run=pay_run)
+> PayRuns update_pay_run(xero_tenant_id, pay_run_id, idempotency_key=idempotency_key, pay_run=pay_run)
 
 Updates a pay run
 
@@ -1891,10 +1913,11 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | PayRun id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 pay_run = [xero_python.payrollau.PayRun()] # list[PayRun] |  (optional)
 try:
     # Updates a pay run
-    api_response = api_instance.update_pay_run(xero_tenant_id, pay_run_id, pay_run=pay_run)
+    api_response = api_instance.update_pay_run(xero_tenant_id, pay_run_id, idempotency_key=idempotency_key, pay_run=pay_run)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->update_pay_run: %s\n" % e)
@@ -1906,6 +1929,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run_id** | [**str**](.md)| PayRun id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **pay_run** | [**list[PayRun]**](PayRun.md)|  | [optional] 
 
 ### Return type
@@ -1924,7 +1948,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_payslip**
-> Payslips update_payslip(xero_tenant_id, payslip_id, payslip_lines=payslip_lines)
+> Payslips update_payslip(xero_tenant_id, payslip_id, idempotency_key=idempotency_key, payslip_lines=payslip_lines)
 
 Updates a payslip
 
@@ -1958,10 +1982,11 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 payslip_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Payslip id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 payslip_lines = { "Payslip": { "EmployeeID": "cdfb8371-0b21-4b8a-8903-1024df6c391e", "DeductionLines": [ { "DeductionTypeID": "727af5e8-b347-4ae7-85fc-9b82266d0aec", "CalculationType": "FIXEDAMOUNT", "NumberOfUnits": 10 } ] } } # list[PayslipLines] |  (optional)
 try:
     # Updates a payslip
-    api_response = api_instance.update_payslip(xero_tenant_id, payslip_id, payslip_lines=payslip_lines)
+    api_response = api_instance.update_payslip(xero_tenant_id, payslip_id, idempotency_key=idempotency_key, payslip_lines=payslip_lines)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->update_payslip: %s\n" % e)
@@ -1973,6 +1998,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **payslip_id** | [**str**](.md)| Payslip id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **payslip_lines** | [**list[PayslipLines]**](PayslipLines.md)|  | [optional] 
 
 ### Return type
@@ -1991,7 +2017,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_superfund**
-> SuperFunds update_superfund(xero_tenant_id, super_fund_id, super_fund=super_fund)
+> SuperFunds update_superfund(xero_tenant_id, super_fund_id, idempotency_key=idempotency_key, super_fund=super_fund)
 
 Updates a superfund
 
@@ -2025,10 +2051,11 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 super_fund_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Superfund id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 super_fund =  [ { "Type":"REGULATED", "Name":"Nice23534" } ] # list[SuperFund] |  (optional)
 try:
     # Updates a superfund
-    api_response = api_instance.update_superfund(xero_tenant_id, super_fund_id, super_fund=super_fund)
+    api_response = api_instance.update_superfund(xero_tenant_id, super_fund_id, idempotency_key=idempotency_key, super_fund=super_fund)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->update_superfund: %s\n" % e)
@@ -2040,6 +2067,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **super_fund_id** | [**str**](.md)| Superfund id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **super_fund** | [**list[SuperFund]**](SuperFund.md)|  | [optional] 
 
 ### Return type
@@ -2058,7 +2086,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_timesheet**
-> Timesheets update_timesheet(xero_tenant_id, timesheet_id, timesheet=timesheet)
+> Timesheets update_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key, timesheet=timesheet)
 
 Updates a timesheet
 
@@ -2092,10 +2120,11 @@ api_instance = PayrollAuApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Timesheet id for single object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 timesheet = [ { "EmployeeID":"b34e89ff-770d-4099-b7e5-f968767118bc", "StartDate":"/Date(1573171200000+0000)/", "EndDate":"/Date(1573689600000+0000)/", "Status":"APPROVED", "Hours":22.0, "TimesheetID":"a7eb0a79-8511-4ee7-b473-3a25f28abcb9", "TimesheetLines":[ { "EarningsRateID":"ab874dfb-ab09-4c91-954e-43acf6fc23b4", "TrackingItemID":"af5e9ce2-2349-4136-be99-3561b189f473", "NumberOfUnits":[ 2.0, 10.0, 0.0, 0.0, 5.0, 0.0, 5.0 ], "UpdatedDateUTC":"/Date(1573516185127+0000)/" } ] } ] # list[Timesheet] |  (optional)
 try:
     # Updates a timesheet
-    api_response = api_instance.update_timesheet(xero_tenant_id, timesheet_id, timesheet=timesheet)
+    api_response = api_instance.update_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key, timesheet=timesheet)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollAuApi->update_timesheet: %s\n" % e)
@@ -2107,6 +2136,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Timesheet id for single object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
  **timesheet** | [**list[Timesheet]**](Timesheet.md)|  | [optional] 
 
 ### Return type
diff --git a/xero_python/payrollau/models/leave_period_status.py b/xero_python/payrollau/models/leave_period_status.py
index 49a73e28..48abd5a9 100644
--- a/xero_python/payrollau/models/leave_period_status.py
+++ b/xero_python/payrollau/models/leave_period_status.py
@@ -26,3 +26,5 @@ class LeavePeriodStatus(Enum):
 
     SCHEDULED = "SCHEDULED"
     PROCESSED = "PROCESSED"
+    REQUESTED = "REQUESTED"
+    REJECTED = "REJECTED"
diff --git a/xero_python/payrollnz/api/payroll_nz_api.py b/xero_python/payrollnz/api/payroll_nz_api.py
index 5f3e96cb..1ac0fca2 100644
--- a/xero_python/payrollnz/api/payroll_nz_api.py
+++ b/xero_python/payrollnz/api/payroll_nz_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def approve_timesheet(
         self,
         xero_tenant_id,
         timesheet_id,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -68,6 +69,7 @@ def approve_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Identifier for the timesheet (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -98,6 +100,9 @@ def approve_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -136,6 +141,7 @@ def create_deduction(
         self,
         xero_tenant_id,
         deduction,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -144,6 +150,7 @@ def create_deduction(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Deduction deduction: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -172,6 +179,9 @@ def create_deduction(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -215,6 +225,7 @@ def create_earnings_rate(
         self,
         xero_tenant_id,
         earnings_rate,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -223,6 +234,7 @@ def create_earnings_rate(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param EarningsRate earnings_rate: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -251,6 +263,9 @@ def create_earnings_rate(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -294,6 +309,7 @@ def create_employee(
         self,
         xero_tenant_id,
         employee,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -302,6 +318,7 @@ def create_employee(
         OAuth2 scope: payroll.employees
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Employee employee: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -330,6 +347,9 @@ def create_employee(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -374,6 +394,7 @@ def create_employee_earnings_template(
         xero_tenant_id,
         employee_id,
         earnings_template,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -383,6 +404,7 @@ def create_employee_earnings_template(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EarningsTemplate earnings_template: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -419,6 +441,9 @@ def create_employee_earnings_template(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -465,6 +490,7 @@ def create_employee_leave(
         xero_tenant_id,
         employee_id,
         employee_leave,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -474,6 +500,7 @@ def create_employee_leave(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeLeave employee_leave: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -510,6 +537,9 @@ def create_employee_leave(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -554,6 +584,7 @@ def create_employee_leave_setup(
         xero_tenant_id,
         employee_id,
         employee_leave_setup,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -563,6 +594,7 @@ def create_employee_leave_setup(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeLeaveSetup employee_leave_setup: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -599,6 +631,9 @@ def create_employee_leave_setup(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -643,6 +678,7 @@ def create_employee_leave_type(
         xero_tenant_id,
         employee_id,
         employee_leave_type,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -652,6 +688,7 @@ def create_employee_leave_type(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeLeaveType employee_leave_type: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -688,6 +725,9 @@ def create_employee_leave_type(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -732,6 +772,7 @@ def create_employee_opening_balances(
         xero_tenant_id,
         employee_id,
         employee_opening_balance,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -741,6 +782,7 @@ def create_employee_opening_balances(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param list[EmployeeOpeningBalance] employee_opening_balance: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -777,6 +819,9 @@ def create_employee_opening_balances(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -823,6 +868,7 @@ def create_employee_payment_method(
         xero_tenant_id,
         employee_id,
         payment_method,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -832,6 +878,7 @@ def create_employee_payment_method(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param PaymentMethod payment_method: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -868,6 +915,9 @@ def create_employee_payment_method(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -914,6 +964,7 @@ def create_employee_salary_and_wage(
         xero_tenant_id,
         employee_id,
         salary_and_wage,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -923,6 +974,7 @@ def create_employee_salary_and_wage(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param SalaryAndWage salary_and_wage: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -959,6 +1011,9 @@ def create_employee_salary_and_wage(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1005,6 +1060,7 @@ def create_employment(
         xero_tenant_id,
         employee_id,
         employment,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1014,6 +1070,7 @@ def create_employment(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param Employment employment: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1050,6 +1107,9 @@ def create_employment(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1093,6 +1153,7 @@ def create_leave_type(
         self,
         xero_tenant_id,
         leave_type,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1101,6 +1162,7 @@ def create_leave_type(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param LeaveType leave_type: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1129,6 +1191,9 @@ def create_leave_type(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1173,6 +1238,7 @@ def create_multiple_employee_earnings_template(
         xero_tenant_id,
         employee_id,
         earnings_template,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1182,6 +1248,7 @@ def create_multiple_employee_earnings_template(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param list[EarningsTemplate] earnings_template: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1218,6 +1285,9 @@ def create_multiple_employee_earnings_template(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1263,6 +1333,7 @@ def create_pay_run(
         self,
         xero_tenant_id,
         pay_run,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1271,6 +1342,7 @@ def create_pay_run(
         OAuth2 scope: payroll.payruns
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PayRun pay_run: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1299,6 +1371,9 @@ def create_pay_run(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1342,6 +1417,7 @@ def create_pay_run_calendar(
         self,
         xero_tenant_id,
         pay_run_calendar,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1350,6 +1426,7 @@ def create_pay_run_calendar(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PayRunCalendar pay_run_calendar: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1378,6 +1455,9 @@ def create_pay_run_calendar(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1421,6 +1501,7 @@ def create_reimbursement(
         self,
         xero_tenant_id,
         reimbursement,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1429,6 +1510,7 @@ def create_reimbursement(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Reimbursement reimbursement: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1457,6 +1539,9 @@ def create_reimbursement(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1500,6 +1585,7 @@ def create_superannuation(
         self,
         xero_tenant_id,
         benefit,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1508,6 +1594,7 @@ def create_superannuation(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Benefit benefit: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1536,6 +1623,9 @@ def create_superannuation(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1579,6 +1669,7 @@ def create_timesheet(
         self,
         xero_tenant_id,
         timesheet,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1587,6 +1678,7 @@ def create_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Timesheet timesheet: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1615,6 +1707,9 @@ def create_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1659,6 +1754,7 @@ def create_timesheet_line(
         xero_tenant_id,
         timesheet_id,
         timesheet_line,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1668,6 +1764,7 @@ def create_timesheet_line(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Identifier for the timesheet (required)
         :param TimesheetLine timesheet_line: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1704,6 +1801,9 @@ def create_timesheet_line(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4762,6 +4862,7 @@ def revert_timesheet(
         self,
         xero_tenant_id,
         timesheet_id,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4770,6 +4871,7 @@ def revert_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Identifier for the timesheet (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4800,6 +4902,9 @@ def revert_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4839,6 +4944,7 @@ def update_employee(
         xero_tenant_id,
         employee_id,
         employee,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4848,6 +4954,7 @@ def update_employee(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param Employee employee: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4884,6 +4991,9 @@ def update_employee(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4929,6 +5039,7 @@ def update_employee_earnings_template(
         employee_id,
         pay_template_earning_id,
         earnings_template,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -4939,6 +5050,7 @@ def update_employee_earnings_template(
         :param str employee_id: Employee id for single object (required)
         :param str pay_template_earning_id: Id for single pay template earnings object (required)
         :param EarningsTemplate earnings_template: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -4982,6 +5094,9 @@ def update_employee_earnings_template(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5031,6 +5146,7 @@ def update_employee_leave(
         employee_id,
         leave_id,
         employee_leave,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5041,6 +5157,7 @@ def update_employee_leave(
         :param str employee_id: Employee id for single object (required)
         :param str leave_id: Leave id for single object (required)
         :param EmployeeLeave employee_leave: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5084,6 +5201,9 @@ def update_employee_leave(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5129,6 +5249,7 @@ def update_employee_salary_and_wage(
         employee_id,
         salary_and_wages_id,
         salary_and_wage,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5139,6 +5260,7 @@ def update_employee_salary_and_wage(
         :param str employee_id: Employee id for single object (required)
         :param str salary_and_wages_id: Id for single pay template earnings object (required)
         :param SalaryAndWage salary_and_wage: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5182,6 +5304,9 @@ def update_employee_salary_and_wage(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5230,6 +5355,7 @@ def update_employee_tax(
         xero_tenant_id,
         employee_id,
         employee_tax,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5239,6 +5365,7 @@ def update_employee_tax(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeTax employee_tax: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5275,6 +5402,9 @@ def update_employee_tax(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5319,6 +5449,7 @@ def update_pay_run(
         xero_tenant_id,
         pay_run_id,
         pay_run,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5328,6 +5459,7 @@ def update_pay_run(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str pay_run_id: Identifier for the pay run (required)
         :param PayRun pay_run: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5364,6 +5496,9 @@ def update_pay_run(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5408,6 +5543,7 @@ def update_pay_slip_line_items(
         xero_tenant_id,
         pay_slip_id,
         pay_slip,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5417,6 +5553,7 @@ def update_pay_slip_line_items(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str pay_slip_id: Identifier for the payslip (required)
         :param PaySlip pay_slip: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5453,6 +5590,9 @@ def update_pay_slip_line_items(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5498,6 +5638,7 @@ def update_timesheet_line(
         timesheet_id,
         timesheet_line_id,
         timesheet_line,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5508,6 +5649,7 @@ def update_timesheet_line(
         :param str timesheet_id: Identifier for the timesheet (required)
         :param str timesheet_line_id: Identifier for the timesheet line (required)
         :param TimesheetLine timesheet_line: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5551,6 +5693,9 @@ def update_timesheet_line(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/payrollnz/docs/PayrollNZApi.md b/xero_python/payrollnz/docs/PayrollNZApi.md
index 0ddb4705..82c3c2e2 100644
--- a/xero_python/payrollnz/docs/PayrollNZApi.md
+++ b/xero_python/payrollnz/docs/PayrollNZApi.md
@@ -75,7 +75,7 @@ Method | HTTP request | Description
 
 
 # **approve_timesheet**
-> TimesheetObject approve_timesheet(xero_tenant_id, timesheet_id)
+> TimesheetObject approve_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
 
 Approves a timesheet
 
@@ -107,9 +107,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Approves a timesheet
-    api_response = api_instance.approve_timesheet(xero_tenant_id, timesheet_id)
+    api_response = api_instance.approve_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->approve_timesheet: %s\n" % e)
@@ -121,6 +122,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -138,7 +140,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_deduction**
-> DeductionObject create_deduction(xero_tenant_id, deduction)
+> DeductionObject create_deduction(xero_tenant_id, deduction, idempotency_key=idempotency_key)
 
 Creates a new deduction for a specific employee
 
@@ -170,9 +172,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 deduction = { "deductionName": "My new deduction", "deductionCategory": "NzOther", "liabilityAccountId": "568f2e9a-0870-46cc-8678-f83f132ed4e3" } # Deduction | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new deduction for a specific employee
-    api_response = api_instance.create_deduction(xero_tenant_id, deduction)
+    api_response = api_instance.create_deduction(xero_tenant_id, deduction, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_deduction: %s\n" % e)
@@ -184,6 +187,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **deduction** | [**Deduction**](Deduction.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -201,7 +205,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_earnings_rate**
-> EarningsRateObject create_earnings_rate(xero_tenant_id, earnings_rate)
+> EarningsRateObject create_earnings_rate(xero_tenant_id, earnings_rate, idempotency_key=idempotency_key)
 
 Creates a new earnings rate
 
@@ -233,9 +237,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 earnings_rate = { "name": "My Earnings Rate", "earningsType": "RegularEarnings", "rateType": "RatePerUnit", "typeOfUnits": "hours", "expenseAccountID": "e4eb36f6-97e3-4427-a394-dd4e1b355c2e" } # EarningsRate | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new earnings rate
-    api_response = api_instance.create_earnings_rate(xero_tenant_id, earnings_rate)
+    api_response = api_instance.create_earnings_rate(xero_tenant_id, earnings_rate, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_earnings_rate: %s\n" % e)
@@ -247,6 +252,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **earnings_rate** | [**EarningsRate**](EarningsRate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -264,7 +270,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee**
-> EmployeeObject create_employee(xero_tenant_id, employee)
+> EmployeeObject create_employee(xero_tenant_id, employee, idempotency_key=idempotency_key)
 
 Creates an employees
 
@@ -296,9 +302,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee = { "title": "Mr", "firstName": "Mike", "lastName": "Johntzxzpxhmkgson", "dateOfBirth": "2000-01-01", "address": { "addressLine1": "101 Green St", "city": "San Francisco", "postCode": "4351", "countryName": "United Kingdom" }, "email": "83139@starkindustries.com", "gender": "M" } # Employee | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an employees
-    api_response = api_instance.create_employee(xero_tenant_id, employee)
+    api_response = api_instance.create_employee(xero_tenant_id, employee, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee: %s\n" % e)
@@ -310,6 +317,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee** | [**Employee**](Employee.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -327,7 +335,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_earnings_template**
-> EarningsTemplateObject create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+> EarningsTemplateObject create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
 
 Creates earnings template records for an employee
 
@@ -360,9 +368,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 earnings_template = { "ratePerUnit": 20, "numberOfUnits": 8, "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "name": "My New One" } # EarningsTemplate | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates earnings template records for an employee
-    api_response = api_instance.create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+    api_response = api_instance.create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_earnings_template: %s\n" % e)
@@ -375,6 +384,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **earnings_template** | [**EarningsTemplate**](EarningsTemplate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -392,7 +402,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_leave**
-> EmployeeLeaveObject create_employee_leave(xero_tenant_id, employee_id, employee_leave)
+> EmployeeLeaveObject create_employee_leave(xero_tenant_id, employee_id, employee_leave, idempotency_key=idempotency_key)
 
 Creates leave records for a specific employee
 
@@ -425,9 +435,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_leave = { "leaveTypeID": "b0b1b79e-2a25-46c2-ad08-ca25ef48d7e4", "description": "Creating a Description", "startDate": "2020-04-24", "endDate": "2020-04-26" } # EmployeeLeave | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates leave records for a specific employee
-    api_response = api_instance.create_employee_leave(xero_tenant_id, employee_id, employee_leave)
+    api_response = api_instance.create_employee_leave(xero_tenant_id, employee_id, employee_leave, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_leave: %s\n" % e)
@@ -440,6 +451,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_leave** | [**EmployeeLeave**](EmployeeLeave.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -457,7 +469,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_leave_setup**
-> EmployeeLeaveSetupObject create_employee_leave_setup(xero_tenant_id, employee_id, employee_leave_setup)
+> EmployeeLeaveSetupObject create_employee_leave_setup(xero_tenant_id, employee_id, employee_leave_setup, idempotency_key=idempotency_key)
 
 Creates a leave set-up for a specific employee. This is required before viewing, configuring and requesting leave for an employee
 
@@ -490,9 +502,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_leave_setup = { "holidayPayOpeningBalance": 10, "annualLeaveOpeningBalance": 100, "sickLeaveHoursToAccrueAnnually": 20, "sickLeaveOpeningBalance": 10 } # EmployeeLeaveSetup | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a leave set-up for a specific employee. This is required before viewing, configuring and requesting leave for an employee
-    api_response = api_instance.create_employee_leave_setup(xero_tenant_id, employee_id, employee_leave_setup)
+    api_response = api_instance.create_employee_leave_setup(xero_tenant_id, employee_id, employee_leave_setup, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_leave_setup: %s\n" % e)
@@ -505,6 +518,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_leave_setup** | [**EmployeeLeaveSetup**](EmployeeLeaveSetup.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -522,7 +536,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_leave_type**
-> EmployeeLeaveTypeObject create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type)
+> EmployeeLeaveTypeObject create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type, idempotency_key=idempotency_key)
 
 Creates leave type records for a specific employee
 
@@ -555,9 +569,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_leave_type = { "leaveTypeID": "35da97ae-05b9-427f-9a98-69157ba42cec", "scheduleOfAccrual": "AnnuallyAfter6Months", "hoursAccruedAnnually": 10, "maximumToAccrue": 80, "openingBalance": 100, "rateAccruedHourly": 3.5 } # EmployeeLeaveType | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates leave type records for a specific employee
-    api_response = api_instance.create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type)
+    api_response = api_instance.create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_leave_type: %s\n" % e)
@@ -570,6 +585,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_leave_type** | [**EmployeeLeaveType**](EmployeeLeaveType.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -587,7 +603,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_opening_balances**
-> EmployeeOpeningBalancesObject create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balance)
+> EmployeeOpeningBalancesObject create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balance, idempotency_key=idempotency_key)
 
 Creates opening balances for a specific employee
 
@@ -620,9 +636,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_opening_balance = [{"periodEndDate":"2020-10-01","daysPaid":3,"unpaidWeeks":2,"grossEarnings":40.0}] # list[EmployeeOpeningBalance] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates opening balances for a specific employee
-    api_response = api_instance.create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balance)
+    api_response = api_instance.create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balance, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_opening_balances: %s\n" % e)
@@ -635,6 +652,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_opening_balance** | [**list[EmployeeOpeningBalance]**](EmployeeOpeningBalance.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -652,7 +670,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_payment_method**
-> PaymentMethodObject create_employee_payment_method(xero_tenant_id, employee_id, payment_method)
+> PaymentMethodObject create_employee_payment_method(xero_tenant_id, employee_id, payment_method, idempotency_key=idempotency_key)
 
 Creates a payment method for an employee
 
@@ -685,9 +703,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 payment_method = xero_python.payrollnz.PaymentMethod() # PaymentMethod | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a payment method for an employee
-    api_response = api_instance.create_employee_payment_method(xero_tenant_id, employee_id, payment_method)
+    api_response = api_instance.create_employee_payment_method(xero_tenant_id, employee_id, payment_method, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_payment_method: %s\n" % e)
@@ -700,6 +719,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **payment_method** | [**PaymentMethod**](PaymentMethod.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -717,7 +737,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_salary_and_wage**
-> SalaryAndWageObject create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage)
+> SalaryAndWageObject create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage, idempotency_key=idempotency_key)
 
 Creates an employee salary and wage record
 
@@ -750,9 +770,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 salary_and_wage = { "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "numberOfUnitsPerWeek": 2, "ratePerUnit": 10, "numberOfUnitsPerDay": 2, "daysPerWeek": 1, "effectiveFrom": "2020-05-01", "annualSalary": 100, "status": "Active", "paymentType": "Salary" } # SalaryAndWage | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an employee salary and wage record
-    api_response = api_instance.create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage)
+    api_response = api_instance.create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employee_salary_and_wage: %s\n" % e)
@@ -765,6 +786,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **salary_and_wage** | [**SalaryAndWage**](SalaryAndWage.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -782,7 +804,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employment**
-> EmploymentObject create_employment(xero_tenant_id, employee_id, employment)
+> EmploymentObject create_employment(xero_tenant_id, employee_id, employment, idempotency_key=idempotency_key)
 
 Creates an employment detail for a specific employee
 
@@ -815,9 +837,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employment = { "payrollCalendarID": "9aa56064-990f-4ad3-a189-d966d8f6a030", "startDate": "2020-09-02" } # Employment | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an employment detail for a specific employee
-    api_response = api_instance.create_employment(xero_tenant_id, employee_id, employment)
+    api_response = api_instance.create_employment(xero_tenant_id, employee_id, employment, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_employment: %s\n" % e)
@@ -830,6 +853,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employment** | [**Employment**](Employment.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -847,7 +871,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_leave_type**
-> LeaveTypeObject create_leave_type(xero_tenant_id, leave_type)
+> LeaveTypeObject create_leave_type(xero_tenant_id, leave_type, idempotency_key=idempotency_key)
 
 Creates a new leave type
 
@@ -879,9 +903,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 leave_type = { "name": "My wqwhhiktun Leave", "isPaidLeave": false, "showOnPayslip": true } # LeaveType | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new leave type
-    api_response = api_instance.create_leave_type(xero_tenant_id, leave_type)
+    api_response = api_instance.create_leave_type(xero_tenant_id, leave_type, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_leave_type: %s\n" % e)
@@ -893,6 +918,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **leave_type** | [**LeaveType**](LeaveType.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -910,7 +936,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_multiple_employee_earnings_template**
-> EmployeeEarningsTemplates create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+> EmployeeEarningsTemplates create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
 
 Creates multiple employee earnings template records for a specific employee
 
@@ -943,9 +969,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 earnings_template = [{"ratePerUnit":20.0,"numberOfUnits":8.0,"earningsRateID":"f9d8f5b5-9049-47f4-8541-35e200f750a5"},{"ratePerUnit":0.0,"numberOfUnits":8.0,"earningsRateID":"65b83d94-f20f-45e1-85ae-387fcf460c26"}] # list[EarningsTemplate] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates multiple employee earnings template records for a specific employee
-    api_response = api_instance.create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+    api_response = api_instance.create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_multiple_employee_earnings_template: %s\n" % e)
@@ -958,6 +985,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **earnings_template** | [**list[EarningsTemplate]**](EarningsTemplate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -975,7 +1003,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_pay_run**
-> PayRunObject create_pay_run(xero_tenant_id, pay_run)
+> PayRunObject create_pay_run(xero_tenant_id, pay_run, idempotency_key=idempotency_key)
 
 Creates a pay run
 
@@ -1007,9 +1035,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run = { "payrollCalendarID": "9aa56064-990f-4ad3-a189-d966d8f6a030", "periodStartDate": "2020-09-08", "periodEndDate": "2020-09-15", "paymentDate": "2020-09-20", "payRunStatus": "Draft", "payRunType": "Scheduled", "calendarType": "Weekly" } # PayRun | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a pay run
-    api_response = api_instance.create_pay_run(xero_tenant_id, pay_run)
+    api_response = api_instance.create_pay_run(xero_tenant_id, pay_run, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_pay_run: %s\n" % e)
@@ -1021,6 +1050,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run** | [**PayRun**](PayRun.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1038,7 +1068,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_pay_run_calendar**
-> PayRunCalendarObject create_pay_run_calendar(xero_tenant_id, pay_run_calendar)
+> PayRunCalendarObject create_pay_run_calendar(xero_tenant_id, pay_run_calendar, idempotency_key=idempotency_key)
 
 Creates a new payrun calendar
 
@@ -1070,9 +1100,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run_calendar = { "name": "My Weekly Cal", "calendarType": "Weekly", "periodStartDate": "2020-05-01", "paymentDate": "2020-05-15" } # PayRunCalendar | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new payrun calendar
-    api_response = api_instance.create_pay_run_calendar(xero_tenant_id, pay_run_calendar)
+    api_response = api_instance.create_pay_run_calendar(xero_tenant_id, pay_run_calendar, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_pay_run_calendar: %s\n" % e)
@@ -1084,6 +1115,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run_calendar** | [**PayRunCalendar**](PayRunCalendar.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1101,7 +1133,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_reimbursement**
-> ReimbursementObject create_reimbursement(xero_tenant_id, reimbursement)
+> ReimbursementObject create_reimbursement(xero_tenant_id, reimbursement, idempotency_key=idempotency_key)
 
 Creates a new reimbursement
 
@@ -1133,9 +1165,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 reimbursement = { "name": "My new Reimburse", "accountID": "fa5cdc43-643b-4ad8-b4ac-3ffe0d0f4488", "reimbursementCategory": "GSTInclusive", "calculationType": "FixedAmount" } # Reimbursement | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new reimbursement
-    api_response = api_instance.create_reimbursement(xero_tenant_id, reimbursement)
+    api_response = api_instance.create_reimbursement(xero_tenant_id, reimbursement, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_reimbursement: %s\n" % e)
@@ -1147,6 +1180,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **reimbursement** | [**Reimbursement**](Reimbursement.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1164,7 +1198,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_superannuation**
-> SuperannuationObject create_superannuation(xero_tenant_id, benefit)
+> SuperannuationObject create_superannuation(xero_tenant_id, benefit, idempotency_key=idempotency_key)
 
 Creates a new superannuation
 
@@ -1196,9 +1230,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 benefit = { "name": "SidSaver", "category": "Other", "liabilityAccountId": "568f2e9a-0870-46cc-8678-f83f132ed4e3", "expenseAccountId": "e4eb36f6-97e3-4427-a394-dd4e1b355c2e", "CalculationTypeNZ": "FixedAmount", "standardAmount": 10 } # Benefit | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new superannuation
-    api_response = api_instance.create_superannuation(xero_tenant_id, benefit)
+    api_response = api_instance.create_superannuation(xero_tenant_id, benefit, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_superannuation: %s\n" % e)
@@ -1210,6 +1245,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **benefit** | [**Benefit**](Benefit.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1227,7 +1263,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_timesheet**
-> TimesheetObject create_timesheet(xero_tenant_id, timesheet)
+> TimesheetObject create_timesheet(xero_tenant_id, timesheet, idempotency_key=idempotency_key)
 
 Creates a new timesheet
 
@@ -1259,9 +1295,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet = { "payrollCalendarID": "9aa56064-990f-4ad3-a189-d966d8f6a030", "employeeID": "68342973-c405-4b86-b5d3-d7b877c27995", "startDate": "2020-04-13", "endDate": "2020-04-19", "timesheetLines": [ { "date": "2020-04-13", "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "numberOfUnits": 8 }, { "date": "2020-04-15", "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "numberOfUnits": 6 } ] } # Timesheet | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new timesheet
-    api_response = api_instance.create_timesheet(xero_tenant_id, timesheet)
+    api_response = api_instance.create_timesheet(xero_tenant_id, timesheet, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_timesheet: %s\n" % e)
@@ -1273,6 +1310,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet** | [**Timesheet**](Timesheet.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1290,7 +1328,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_timesheet_line**
-> TimesheetLineObject create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line)
+> TimesheetLineObject create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line, idempotency_key=idempotency_key)
 
 Create a new timesheet line for a specific time sheet
 
@@ -1323,9 +1361,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
 timesheet_line = { "date": "2020-08-03", "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "numberOfUnits": 1 } # TimesheetLine | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Create a new timesheet line for a specific time sheet
-    api_response = api_instance.create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line)
+    api_response = api_instance.create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->create_timesheet_line: %s\n" % e)
@@ -1338,6 +1377,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
  **timesheet_line** | [**TimesheetLine**](TimesheetLine.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3842,7 +3882,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **revert_timesheet**
-> TimesheetObject revert_timesheet(xero_tenant_id, timesheet_id)
+> TimesheetObject revert_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
 
 Reverts a timesheet to draft
 
@@ -3874,9 +3914,10 @@ api_instance = PayrollNzApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Reverts a timesheet to draft
-    api_response = api_instance.revert_timesheet(xero_tenant_id, timesheet_id)
+    api_response = api_instance.revert_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->revert_timesheet: %s\n" % e)
@@ -3888,6 +3929,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3905,7 +3947,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee**
-> EmployeeObject update_employee(xero_tenant_id, employee_id, employee)
+> EmployeeObject update_employee(xero_tenant_id, employee_id, employee, idempotency_key=idempotency_key)
 
 Updates an existing employee
 
@@ -3938,9 +3980,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee = { "title": "Mr", "firstName": "Tony", "lastName": "Starkgtrzgquusrson", "dateOfBirth": "1999-01-01", "address": { "addressLine1": "101 Green St", "city": "San Francisco", "postCode": "4432", "countryName": "United Kingdom" }, "email": "58315@starkindustries.com", "gender": "M" } # Employee | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates an existing employee
-    api_response = api_instance.update_employee(xero_tenant_id, employee_id, employee)
+    api_response = api_instance.update_employee(xero_tenant_id, employee_id, employee, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_employee: %s\n" % e)
@@ -3953,6 +3996,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee** | [**Employee**](Employee.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -3970,7 +4014,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_earnings_template**
-> EarningsTemplateObject update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template)
+> EarningsTemplateObject update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template, idempotency_key=idempotency_key)
 
 Updates an earnings template records for an employee
 
@@ -4004,9 +4048,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 pay_template_earning_id = '3fa85f64-5717-4562-b3fc-2c963f66afa6' # str | Id for single pay template earnings object
 earnings_template = { "ratePerUnit": 25, "numberOfUnits": 4, "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5" } # EarningsTemplate | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates an earnings template records for an employee
-    api_response = api_instance.update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template)
+    api_response = api_instance.update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_employee_earnings_template: %s\n" % e)
@@ -4020,6 +4065,7 @@ Name | Type | Description  | Notes
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **pay_template_earning_id** | [**str**](.md)| Id for single pay template earnings object | 
  **earnings_template** | [**EarningsTemplate**](EarningsTemplate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4037,7 +4083,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_leave**
-> EmployeeLeaveObject update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave)
+> EmployeeLeaveObject update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave, idempotency_key=idempotency_key)
 
 Updates leave records for a specific employee
 
@@ -4071,9 +4117,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 leave_id = 'c4be24e5-e840-4c92-9eaa-2d86cd596314' # str | Leave id for single object
 employee_leave = { "leaveTypeID": "b0b1b79e-2a25-46c2-ad08-ca25ef48d7e4", "description": "Creating a Description", "startDate": "2020-04-24", "endDate": "2020-04-26", "periods": [ { "periodStartDate": "2020-04-20", "periodEndDate": "2020-04-26", "numberOfUnits": 1, "periodStatus": "Approved" } ] } # EmployeeLeave | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates leave records for a specific employee
-    api_response = api_instance.update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave)
+    api_response = api_instance.update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_employee_leave: %s\n" % e)
@@ -4087,6 +4134,7 @@ Name | Type | Description  | Notes
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **leave_id** | [**str**](.md)| Leave id for single object | 
  **employee_leave** | [**EmployeeLeave**](EmployeeLeave.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4104,7 +4152,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_salary_and_wage**
-> SalaryAndWageObject update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage)
+> SalaryAndWageObject update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage, idempotency_key=idempotency_key)
 
 Updates an employee's salary and wages record
 
@@ -4138,9 +4186,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 salary_and_wages_id = '3fa85f64-5717-4562-b3fc-2c963f66afa6' # str | Id for single pay template earnings object
 salary_and_wage = { "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "numberOfUnitsPerWeek": 3, "ratePerUnit": 11, "numberOfUnitsPerDay": 3, "daysPerWeek": 1, "effectiveFrom": "2020-05-15", "annualSalary": 101, "status": "Active", "paymentType": "Salary" } # SalaryAndWage | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates an employee's salary and wages record
-    api_response = api_instance.update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage)
+    api_response = api_instance.update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_employee_salary_and_wage: %s\n" % e)
@@ -4154,6 +4203,7 @@ Name | Type | Description  | Notes
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **salary_and_wages_id** | [**str**](.md)| Id for single pay template earnings object | 
  **salary_and_wage** | [**SalaryAndWage**](SalaryAndWage.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4171,7 +4221,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_tax**
-> EmployeeTaxObject update_employee_tax(xero_tenant_id, employee_id, employee_tax)
+> EmployeeTaxObject update_employee_tax(xero_tenant_id, employee_id, employee_tax, idempotency_key=idempotency_key)
 
 Updates the tax records for a specific employee
 
@@ -4204,9 +4254,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_tax = xero_python.payrollnz.EmployeeTax() # EmployeeTax | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates the tax records for a specific employee
-    api_response = api_instance.update_employee_tax(xero_tenant_id, employee_id, employee_tax)
+    api_response = api_instance.update_employee_tax(xero_tenant_id, employee_id, employee_tax, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_employee_tax: %s\n" % e)
@@ -4219,6 +4270,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_tax** | [**EmployeeTax**](EmployeeTax.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4236,7 +4288,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_pay_run**
-> PayRunObject update_pay_run(xero_tenant_id, pay_run_id, pay_run)
+> PayRunObject update_pay_run(xero_tenant_id, pay_run_id, pay_run, idempotency_key=idempotency_key)
 
 Updates a pay run
 
@@ -4269,9 +4321,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run_id = 'pay_run_id_example' # str | Identifier for the pay run
 pay_run = { "paymentDate": "2019-07-01" } # PayRun | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a pay run
-    api_response = api_instance.update_pay_run(xero_tenant_id, pay_run_id, pay_run)
+    api_response = api_instance.update_pay_run(xero_tenant_id, pay_run_id, pay_run, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_pay_run: %s\n" % e)
@@ -4284,6 +4337,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run_id** | [**str**](.md)| Identifier for the pay run | 
  **pay_run** | [**PayRun**](PayRun.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4301,7 +4355,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_pay_slip_line_items**
-> PaySlipObject update_pay_slip_line_items(xero_tenant_id, pay_slip_id, pay_slip)
+> PaySlipObject update_pay_slip_line_items(xero_tenant_id, pay_slip_id, pay_slip, idempotency_key=idempotency_key)
 
 Creates an employee pay slip
 
@@ -4334,9 +4388,10 @@ api_instance = PayrollNzApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_slip_id = 'pay_slip_id_example' # str | Identifier for the payslip
 pay_slip = { "earningsLines": [ { "earningsLineID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "displayName": "Ordinary Time", "ratePerUnit": 25, "numberOfUnits": 0, "amount": 0, "isLinkedToTimesheet": false, "isSystemGenerated": true }, { "earningsLineID": "65b83d94-f20f-45e1-85ae-387fcf460c26", "earningsRateID": "65b83d94-f20f-45e1-85ae-387fcf460c26", "displayName": "Salary", "ratePerUnit": 0, "numberOfUnits": 8, "amount": 0, "isLinkedToTimesheet": false, "isSystemGenerated": false } ], "leaveEarningsLines": [ { "earningsLineID": "0441497f-5dc7-4cd3-a90d-f2e07e21b2a6", "earningsRateID": "39b3560a-5d2f-4538-924a-4349dc86396e", "displayName": "Holiday Pay", "fixedAmount": 268.8, "amount": 268.8, "isLinkedToTimesheet": false, "isSystemGenerated": true } ], "deductionLines": [ { "deductionTypeID": "a3760fe4-68a4-4e38-8326-fe616af7dc74", "amount": 100 } ], "leaveAccrualLines": [ { "leaveTypeID": "0441497f-5dc7-4cd3-a90d-f2e07e21b2a6", "numberOfUnits": 268.8 }, { "leaveTypeID": "b0b1b79e-2a25-46c2-ad08-ca25ef48d7e4", "numberOfUnits": 0 }, { "leaveTypeID": "f2f994cf-1899-46f3-ad4f-5d92d78c3719", "numberOfUnits": 0 }, { "leaveTypeID": "34129765-11cb-4d8c-b568-84a2219beda3", "numberOfUnits": 0 } ], "superannuationLines": [ { "superannuationTypeID": "563273ea-0dae-4f82-86a4-e0db77c008ea", "displayName": "KiwiSaver", "amount": 108.86, "fixedAmount": 3, "percentage": 3, "manualAdjustment": false } ], "employeeTaxLines": [ { "taxLineID": "1084146b-e890-489c-aed3-06de80f63d84", "amount": 1057.22, "globalTaxTypeID": "11", "manualAdjustment": false } ], "employerTaxLines": [ { "taxLineID": "6f9eb8cd-0f4a-440b-939c-bdb0f6ad694c", "amount": 18.9, "globalTaxTypeID": "10", "manualAdjustment": false } ], "statutoryDeductionLines": [ { "statutoryDeductionTypeID": "b5efd8d1-0c93-4a14-a314-b5cba4a4e6b3", "amount": 108.86 } ], "grossEarningsHistory": { "daysPaid": 3, "unpaidWeeks": 0 } } # PaySlip | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an employee pay slip
-    api_response = api_instance.update_pay_slip_line_items(xero_tenant_id, pay_slip_id, pay_slip)
+    api_response = api_instance.update_pay_slip_line_items(xero_tenant_id, pay_slip_id, pay_slip, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_pay_slip_line_items: %s\n" % e)
@@ -4349,6 +4404,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_slip_id** | [**str**](.md)| Identifier for the payslip | 
  **pay_slip** | [**PaySlip**](PaySlip.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4366,7 +4422,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_timesheet_line**
-> TimesheetLineObject update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line)
+> TimesheetLineObject update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line, idempotency_key=idempotency_key)
 
 Updates a timesheet line for a specific timesheet
 
@@ -4400,9 +4456,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
 timesheet_line_id = 'timesheet_line_id_example' # str | Identifier for the timesheet line
 timesheet_line = { "date": "2020-08-04", "earningsRateID": "f9d8f5b5-9049-47f4-8541-35e200f750a5", "numberOfUnits": 2 } # TimesheetLine | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a timesheet line for a specific timesheet
-    api_response = api_instance.update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line)
+    api_response = api_instance.update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollNzApi->update_timesheet_line: %s\n" % e)
@@ -4416,6 +4473,7 @@ Name | Type | Description  | Notes
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
  **timesheet_line_id** | [**str**](.md)| Identifier for the timesheet line | 
  **timesheet_line** | [**TimesheetLine**](TimesheetLine.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
diff --git a/xero_python/payrolluk/api/payroll_uk_api.py b/xero_python/payrolluk/api/payroll_uk_api.py
index bf9eb0cd..00124b7e 100644
--- a/xero_python/payrolluk/api/payroll_uk_api.py
+++ b/xero_python/payrolluk/api/payroll_uk_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def approve_timesheet(
         self,
         xero_tenant_id,
         timesheet_id,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -68,6 +69,7 @@ def approve_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Identifier for the timesheet (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -98,6 +100,9 @@ def approve_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -136,6 +141,7 @@ def create_benefit(
         self,
         xero_tenant_id,
         benefit,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -144,6 +150,7 @@ def create_benefit(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Benefit benefit: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -172,6 +179,9 @@ def create_benefit(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -215,6 +225,7 @@ def create_deduction(
         self,
         xero_tenant_id,
         deduction,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -223,6 +234,7 @@ def create_deduction(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Deduction deduction: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -251,6 +263,9 @@ def create_deduction(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -294,6 +309,7 @@ def create_earnings_rate(
         self,
         xero_tenant_id,
         earnings_rate,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -302,6 +318,7 @@ def create_earnings_rate(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param EarningsRate earnings_rate: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -330,6 +347,9 @@ def create_earnings_rate(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -373,6 +393,7 @@ def create_employee(
         self,
         xero_tenant_id,
         employee,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -381,6 +402,7 @@ def create_employee(
         OAuth2 scope: payroll.employees
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Employee employee: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -409,6 +431,9 @@ def create_employee(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -453,6 +478,7 @@ def create_employee_earnings_template(
         xero_tenant_id,
         employee_id,
         earnings_template,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -462,6 +488,7 @@ def create_employee_earnings_template(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EarningsTemplate earnings_template: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -498,6 +525,9 @@ def create_employee_earnings_template(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -544,6 +574,7 @@ def create_employee_leave(
         xero_tenant_id,
         employee_id,
         employee_leave,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -553,6 +584,7 @@ def create_employee_leave(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeLeave employee_leave: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -589,6 +621,9 @@ def create_employee_leave(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -633,6 +668,7 @@ def create_employee_leave_type(
         xero_tenant_id,
         employee_id,
         employee_leave_type,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -642,6 +678,7 @@ def create_employee_leave_type(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeLeaveType employee_leave_type: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -678,6 +715,9 @@ def create_employee_leave_type(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -722,6 +762,7 @@ def create_employee_opening_balances(
         xero_tenant_id,
         employee_id,
         employee_opening_balances,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -731,6 +772,7 @@ def create_employee_opening_balances(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeOpeningBalances employee_opening_balances: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -767,6 +809,9 @@ def create_employee_opening_balances(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -813,6 +858,7 @@ def create_employee_payment_method(
         xero_tenant_id,
         employee_id,
         payment_method,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -822,6 +868,7 @@ def create_employee_payment_method(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param PaymentMethod payment_method: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -858,6 +905,9 @@ def create_employee_payment_method(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -904,6 +954,7 @@ def create_employee_salary_and_wage(
         xero_tenant_id,
         employee_id,
         salary_and_wage,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -913,6 +964,7 @@ def create_employee_salary_and_wage(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param SalaryAndWage salary_and_wage: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -949,6 +1001,9 @@ def create_employee_salary_and_wage(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -994,6 +1049,7 @@ def create_employee_statutory_sick_leave(
         self,
         xero_tenant_id,
         employee_statutory_sick_leave,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1002,6 +1058,7 @@ def create_employee_statutory_sick_leave(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param EmployeeStatutorySickLeave employee_statutory_sick_leave: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1030,6 +1087,9 @@ def create_employee_statutory_sick_leave(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1076,6 +1136,7 @@ def create_employment(
         xero_tenant_id,
         employee_id,
         employment,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1085,6 +1146,7 @@ def create_employment(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param Employment employment: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1121,6 +1183,9 @@ def create_employment(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1164,6 +1229,7 @@ def create_leave_type(
         self,
         xero_tenant_id,
         leave_type,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1172,6 +1238,7 @@ def create_leave_type(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param LeaveType leave_type: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1200,6 +1267,9 @@ def create_leave_type(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1244,6 +1314,7 @@ def create_multiple_employee_earnings_template(
         xero_tenant_id,
         employee_id,
         earnings_template,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1253,6 +1324,7 @@ def create_multiple_employee_earnings_template(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param list[EarningsTemplate] earnings_template: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1289,6 +1361,9 @@ def create_multiple_employee_earnings_template(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1334,6 +1409,7 @@ def create_pay_run_calendar(
         self,
         xero_tenant_id,
         pay_run_calendar,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1342,6 +1418,7 @@ def create_pay_run_calendar(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param PayRunCalendar pay_run_calendar: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1370,6 +1447,9 @@ def create_pay_run_calendar(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1413,6 +1493,7 @@ def create_reimbursement(
         self,
         xero_tenant_id,
         reimbursement,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1421,6 +1502,7 @@ def create_reimbursement(
         OAuth2 scope: payroll.settings
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Reimbursement reimbursement: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1449,6 +1531,9 @@ def create_reimbursement(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1492,6 +1577,7 @@ def create_timesheet(
         self,
         xero_tenant_id,
         timesheet,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1500,6 +1586,7 @@ def create_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param Timesheet timesheet: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1528,6 +1615,9 @@ def create_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1572,6 +1662,7 @@ def create_timesheet_line(
         xero_tenant_id,
         timesheet_id,
         timesheet_line,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1581,6 +1672,7 @@ def create_timesheet_line(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Identifier for the timesheet (required)
         :param TimesheetLine timesheet_line: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1617,6 +1709,9 @@ def create_timesheet_line(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -4996,6 +5091,7 @@ def revert_timesheet(
         self,
         xero_tenant_id,
         timesheet_id,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5004,6 +5100,7 @@ def revert_timesheet(
         OAuth2 scope: payroll.timesheets
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str timesheet_id: Identifier for the timesheet (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5034,6 +5131,9 @@ def revert_timesheet(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5073,6 +5173,7 @@ def update_employee(
         xero_tenant_id,
         employee_id,
         employee,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5082,6 +5183,7 @@ def update_employee(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param Employee employee: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5118,6 +5220,9 @@ def update_employee(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5163,6 +5268,7 @@ def update_employee_earnings_template(
         employee_id,
         pay_template_earning_id,
         earnings_template,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5173,6 +5279,7 @@ def update_employee_earnings_template(
         :param str employee_id: Employee id for single object (required)
         :param str pay_template_earning_id: Id for single pay template earnings object (required)
         :param EarningsTemplate earnings_template: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5216,6 +5323,9 @@ def update_employee_earnings_template(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5265,6 +5375,7 @@ def update_employee_leave(
         employee_id,
         leave_id,
         employee_leave,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5275,6 +5386,7 @@ def update_employee_leave(
         :param str employee_id: Employee id for single object (required)
         :param str leave_id: Leave id for single object (required)
         :param EmployeeLeave employee_leave: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5318,6 +5430,9 @@ def update_employee_leave(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5362,6 +5477,7 @@ def update_employee_opening_balances(
         xero_tenant_id,
         employee_id,
         employee_opening_balances,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5371,6 +5487,7 @@ def update_employee_opening_balances(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str employee_id: Employee id for single object (required)
         :param EmployeeOpeningBalances employee_opening_balances: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5407,6 +5524,9 @@ def update_employee_opening_balances(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5454,6 +5574,7 @@ def update_employee_salary_and_wage(
         employee_id,
         salary_and_wages_id,
         salary_and_wage,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5464,6 +5585,7 @@ def update_employee_salary_and_wage(
         :param str employee_id: Employee id for single object (required)
         :param str salary_and_wages_id: Id for single pay template earnings object (required)
         :param SalaryAndWage salary_and_wage: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5507,6 +5629,9 @@ def update_employee_salary_and_wage(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5555,6 +5680,7 @@ def update_pay_run(
         xero_tenant_id,
         pay_run_id,
         pay_run,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5564,6 +5690,7 @@ def update_pay_run(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str pay_run_id: Identifier for the pay run (required)
         :param PayRun pay_run: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5600,6 +5727,9 @@ def update_pay_run(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -5645,6 +5775,7 @@ def update_timesheet_line(
         timesheet_id,
         timesheet_line_id,
         timesheet_line,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -5655,6 +5786,7 @@ def update_timesheet_line(
         :param str timesheet_id: Identifier for the timesheet (required)
         :param str timesheet_line_id: Identifier for the timesheet line (required)
         :param TimesheetLine timesheet_line: (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -5698,6 +5830,9 @@ def update_timesheet_line(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/payrolluk/docs/PayrollUkApi.md b/xero_python/payrolluk/docs/PayrollUkApi.md
index 89391f7a..e2c0621b 100644
--- a/xero_python/payrolluk/docs/PayrollUkApi.md
+++ b/xero_python/payrolluk/docs/PayrollUkApi.md
@@ -77,7 +77,7 @@ Method | HTTP request | Description
 
 
 # **approve_timesheet**
-> TimesheetObject approve_timesheet(xero_tenant_id, timesheet_id)
+> TimesheetObject approve_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
 
 Approves a specific timesheet
 
@@ -109,9 +109,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Approves a specific timesheet
-    api_response = api_instance.approve_timesheet(xero_tenant_id, timesheet_id)
+    api_response = api_instance.approve_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->approve_timesheet: %s\n" % e)
@@ -123,6 +124,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -140,7 +142,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_benefit**
-> BenefitObject create_benefit(xero_tenant_id, benefit)
+> BenefitObject create_benefit(xero_tenant_id, benefit, idempotency_key=idempotency_key)
 
 Creates a new employee benefit
 
@@ -172,9 +174,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 benefit = { "name": "My Big Bennie", "category": "StakeholderPension", "liabilityAccountId": "e0faa299-ca0d-4b0a-9e32-0dfabdf9179a", "expenseAccountId": "4b03500d-32fd-4616-8d70-e1e56e0519c6", "standardAmount": 50, "percentage": 25, "calculationType": "PercentageOfGross" } # Benefit | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new employee benefit
-    api_response = api_instance.create_benefit(xero_tenant_id, benefit)
+    api_response = api_instance.create_benefit(xero_tenant_id, benefit, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_benefit: %s\n" % e)
@@ -186,6 +189,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **benefit** | [**Benefit**](Benefit.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -203,7 +207,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_deduction**
-> DeductionObject create_deduction(xero_tenant_id, deduction)
+> DeductionObject create_deduction(xero_tenant_id, deduction, idempotency_key=idempotency_key)
 
 Creates a new deduction
 
@@ -235,9 +239,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 deduction = { "deductionName": "My new deduction", "deductionCategory": "SalarySacrifice", "liabilityAccountId": "e0faa299-ca0d-4b0a-9e32-0dfabdf9179a", "calculationType": "FixedAmount" } # Deduction | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new deduction
-    api_response = api_instance.create_deduction(xero_tenant_id, deduction)
+    api_response = api_instance.create_deduction(xero_tenant_id, deduction, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_deduction: %s\n" % e)
@@ -249,6 +254,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **deduction** | [**Deduction**](Deduction.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -266,7 +272,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_earnings_rate**
-> EarningsRateObject create_earnings_rate(xero_tenant_id, earnings_rate)
+> EarningsRateObject create_earnings_rate(xero_tenant_id, earnings_rate, idempotency_key=idempotency_key)
 
 Creates a new earnings rate
 
@@ -298,9 +304,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 earnings_rate = { "name": "My Earnings Rate", "earningsType": "RegularEarnings", "rateType": "RatePerUnit", "typeOfUnits": "hours", "expenseAccountID": "4b03500d-32fd-4616-8d70-e1e56e0519c6" } # EarningsRate | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new earnings rate
-    api_response = api_instance.create_earnings_rate(xero_tenant_id, earnings_rate)
+    api_response = api_instance.create_earnings_rate(xero_tenant_id, earnings_rate, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_earnings_rate: %s\n" % e)
@@ -312,6 +319,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **earnings_rate** | [**EarningsRate**](EarningsRate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -329,7 +337,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee**
-> EmployeeObject create_employee(xero_tenant_id, employee)
+> EmployeeObject create_employee(xero_tenant_id, employee, idempotency_key=idempotency_key)
 
 Creates employees
 
@@ -361,9 +369,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee = { "title":"Mr", "firstName":"Mike", "lastName":"Fancy", "dateOfBirth":"1999-01-01T00:00:00", "gender":"M", "email":"mike@starkindustries.com", "isOffPayrollWorker": false, "address": { "addressLine1": "171 Midsummer", "city": "Milton Keyness", "postCode": "MK9 1EB" } } # Employee | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates employees
-    api_response = api_instance.create_employee(xero_tenant_id, employee)
+    api_response = api_instance.create_employee(xero_tenant_id, employee, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee: %s\n" % e)
@@ -375,6 +384,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee** | [**Employee**](Employee.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -392,7 +402,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_earnings_template**
-> EarningsTemplateObject create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+> EarningsTemplateObject create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
 
 Creates an earnings template records for a specific employee
 
@@ -425,9 +435,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 earnings_template = xero_python.payrolluk.EarningsTemplate() # EarningsTemplate | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an earnings template records for a specific employee
-    api_response = api_instance.create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+    api_response = api_instance.create_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_earnings_template: %s\n" % e)
@@ -440,6 +451,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **earnings_template** | [**EarningsTemplate**](EarningsTemplate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -457,7 +469,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_leave**
-> EmployeeLeaveObject create_employee_leave(xero_tenant_id, employee_id, employee_leave)
+> EmployeeLeaveObject create_employee_leave(xero_tenant_id, employee_id, employee_leave, idempotency_key=idempotency_key)
 
 Creates leave records for a specific employee
 
@@ -490,9 +502,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_leave = { "leaveTypeID": "1d2778ee-86ea-45c0-bbf8-1045485f6b3f", "description": "Creating a Description", "startDate": "2020-03-24", "endDate": "2020-03-26" } # EmployeeLeave | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates leave records for a specific employee
-    api_response = api_instance.create_employee_leave(xero_tenant_id, employee_id, employee_leave)
+    api_response = api_instance.create_employee_leave(xero_tenant_id, employee_id, employee_leave, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_leave: %s\n" % e)
@@ -505,6 +518,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_leave** | [**EmployeeLeave**](EmployeeLeave.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -522,7 +536,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_leave_type**
-> EmployeeLeaveTypeObject create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type)
+> EmployeeLeaveTypeObject create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type, idempotency_key=idempotency_key)
 
 Creates employee leave type records
 
@@ -555,9 +569,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_leave_type = { "leaveTypeID": "4918f233-bd31-43f9-9633-bcc6de1178f2", "scheduleOfAccrual": "BeginningOfCalendarYear", "hoursAccruedAnnually": 10 } # EmployeeLeaveType | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates employee leave type records
-    api_response = api_instance.create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type)
+    api_response = api_instance.create_employee_leave_type(xero_tenant_id, employee_id, employee_leave_type, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_leave_type: %s\n" % e)
@@ -570,6 +585,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_leave_type** | [**EmployeeLeaveType**](EmployeeLeaveType.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -587,7 +603,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_opening_balances**
-> EmployeeOpeningBalancesObject create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances)
+> EmployeeOpeningBalancesObject create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances, idempotency_key=idempotency_key)
 
 Creates an opening balance for a specific employee
 
@@ -620,9 +636,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_opening_balances = { "statutoryAdoptionPay": 10, "statutoryMaternityPay": 10, "statutoryPaternityPay": 10, "statutorySharedParentalPay": 10, "statutorySickPay": 10, "priorEmployeeNumber": 10 } # EmployeeOpeningBalances | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an opening balance for a specific employee
-    api_response = api_instance.create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances)
+    api_response = api_instance.create_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_opening_balances: %s\n" % e)
@@ -635,6 +652,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_opening_balances** | [**EmployeeOpeningBalances**](EmployeeOpeningBalances.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -652,7 +670,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_payment_method**
-> PaymentMethodObject create_employee_payment_method(xero_tenant_id, employee_id, payment_method)
+> PaymentMethodObject create_employee_payment_method(xero_tenant_id, employee_id, payment_method, idempotency_key=idempotency_key)
 
 Creates an employee payment method
 
@@ -685,9 +703,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 payment_method = { "paymentMethod": "Electronically", "bankAccounts": [ { "accountName": "Sid BofA", "accountNumber": "24987654", "sortCode": "287654" } ] } # PaymentMethod | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates an employee payment method
-    api_response = api_instance.create_employee_payment_method(xero_tenant_id, employee_id, payment_method)
+    api_response = api_instance.create_employee_payment_method(xero_tenant_id, employee_id, payment_method, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_payment_method: %s\n" % e)
@@ -700,6 +719,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **payment_method** | [**PaymentMethod**](PaymentMethod.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -717,7 +737,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_salary_and_wage**
-> SalaryAndWageObject create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage)
+> SalaryAndWageObject create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage, idempotency_key=idempotency_key)
 
 Creates a salary and wage record for a specific employee
 
@@ -750,9 +770,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 salary_and_wage = { "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27", "numberOfUnitsPerWeek": 2, "ratePerUnit": 10, "numberOfUnitsPerDay": 2, "effectiveFrom": "2020-05-01", "annualSalary": 100, "status": "ACTIVE", "paymentType": "Salary" } # SalaryAndWage | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a salary and wage record for a specific employee
-    api_response = api_instance.create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage)
+    api_response = api_instance.create_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wage, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_salary_and_wage: %s\n" % e)
@@ -765,6 +786,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **salary_and_wage** | [**SalaryAndWage**](SalaryAndWage.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -782,7 +804,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employee_statutory_sick_leave**
-> EmployeeStatutorySickLeaveObject create_employee_statutory_sick_leave(xero_tenant_id, employee_statutory_sick_leave)
+> EmployeeStatutorySickLeaveObject create_employee_statutory_sick_leave(xero_tenant_id, employee_statutory_sick_leave, idempotency_key=idempotency_key)
 
 Creates statutory sick leave records
 
@@ -814,9 +836,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_statutory_sick_leave = { "employeeID": "aad6b292-7b94-408b-93f6-e489867e3fb0", "leaveTypeID": "aab78802-e9d3-4bbd-bc87-df858054988f", "startDate": "2020-04-21", "endDate": "2020-04-24", "workPattern": [ "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" ], "isPregnancyRelated": false, "sufficientNotice": true } # EmployeeStatutorySickLeave | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates statutory sick leave records
-    api_response = api_instance.create_employee_statutory_sick_leave(xero_tenant_id, employee_statutory_sick_leave)
+    api_response = api_instance.create_employee_statutory_sick_leave(xero_tenant_id, employee_statutory_sick_leave, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employee_statutory_sick_leave: %s\n" % e)
@@ -828,6 +851,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_statutory_sick_leave** | [**EmployeeStatutorySickLeave**](EmployeeStatutorySickLeave.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -845,7 +869,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_employment**
-> EmploymentObject create_employment(xero_tenant_id, employee_id, employment)
+> EmploymentObject create_employment(xero_tenant_id, employee_id, employment, idempotency_key=idempotency_key)
 
 Creates employment detail for a specific employee using a unique employee ID
 
@@ -878,9 +902,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employment = { "PayrollCalendarID": "216d80e6-af55-47b1-b718-9457c3f5d2fe", "StartDate": "2020-04-01", "EmployeeNumber": "123ABC", "NICategory": "A" } # Employment | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates employment detail for a specific employee using a unique employee ID
-    api_response = api_instance.create_employment(xero_tenant_id, employee_id, employment)
+    api_response = api_instance.create_employment(xero_tenant_id, employee_id, employment, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_employment: %s\n" % e)
@@ -893,6 +918,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employment** | [**Employment**](Employment.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -910,7 +936,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_leave_type**
-> LeaveTypeObject create_leave_type(xero_tenant_id, leave_type)
+> LeaveTypeObject create_leave_type(xero_tenant_id, leave_type, idempotency_key=idempotency_key)
 
 Creates a new leave type
 
@@ -942,9 +968,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 leave_type = { "name": "My opebvwbfxf Leave", "isPaidLeave": false, "showOnPayslip": true } # LeaveType | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new leave type
-    api_response = api_instance.create_leave_type(xero_tenant_id, leave_type)
+    api_response = api_instance.create_leave_type(xero_tenant_id, leave_type, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_leave_type: %s\n" % e)
@@ -956,6 +983,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **leave_type** | [**LeaveType**](LeaveType.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -973,7 +1001,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_multiple_employee_earnings_template**
-> EmployeePayTemplates create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+> EmployeePayTemplates create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
 
 Creates multiple earnings template records for a specific employee using a unique employee ID
 
@@ -1006,9 +1034,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 earnings_template = [ { "ratePerUnit":20.0, "numberOfUnits":8.0, "earningsRateID":"87f5b43a-cf51-4b74-92de-94c819e82d27" }, { "ratePerUnit":20.0, "numberOfUnits":8.0, "earningsRateID":"973365f3-66b2-4c33-8ae6-14b75f78f68b" } ] # list[EarningsTemplate] | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates multiple earnings template records for a specific employee using a unique employee ID
-    api_response = api_instance.create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template)
+    api_response = api_instance.create_multiple_employee_earnings_template(xero_tenant_id, employee_id, earnings_template, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_multiple_employee_earnings_template: %s\n" % e)
@@ -1021,6 +1050,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **earnings_template** | [**list[EarningsTemplate]**](EarningsTemplate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1038,7 +1068,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_pay_run_calendar**
-> PayRunCalendarObject create_pay_run_calendar(xero_tenant_id, pay_run_calendar)
+> PayRunCalendarObject create_pay_run_calendar(xero_tenant_id, pay_run_calendar, idempotency_key=idempotency_key)
 
 Creates a new payrun calendar
 
@@ -1070,9 +1100,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run_calendar = { "name": "My Weekly Cal", "calendarType": "Weekly", "periodStartDate": "2020-05-01", "paymentDate": "2020-05-15" } # PayRunCalendar | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new payrun calendar
-    api_response = api_instance.create_pay_run_calendar(xero_tenant_id, pay_run_calendar)
+    api_response = api_instance.create_pay_run_calendar(xero_tenant_id, pay_run_calendar, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_pay_run_calendar: %s\n" % e)
@@ -1084,6 +1115,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run_calendar** | [**PayRunCalendar**](PayRunCalendar.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1101,7 +1133,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_reimbursement**
-> ReimbursementObject create_reimbursement(xero_tenant_id, reimbursement)
+> ReimbursementObject create_reimbursement(xero_tenant_id, reimbursement, idempotency_key=idempotency_key)
 
 Creates a new reimbursement
 
@@ -1133,9 +1165,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 reimbursement = { "name": "My new Reimburse", "accountID": "9ee28149-32a9-4661-8eab-a28738696983" } # Reimbursement | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new reimbursement
-    api_response = api_instance.create_reimbursement(xero_tenant_id, reimbursement)
+    api_response = api_instance.create_reimbursement(xero_tenant_id, reimbursement, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_reimbursement: %s\n" % e)
@@ -1147,6 +1180,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **reimbursement** | [**Reimbursement**](Reimbursement.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1164,7 +1198,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_timesheet**
-> TimesheetObject create_timesheet(xero_tenant_id, timesheet)
+> TimesheetObject create_timesheet(xero_tenant_id, timesheet, idempotency_key=idempotency_key)
 
 Creates a new timesheet
 
@@ -1196,9 +1230,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet = { "payrollCalendarID": "216d80e6-af55-47b1-b718-9457c3f5d2fe", "employeeID": "aad6b292-7b94-408b-93f6-e489867e3fb0", "startDate": "2020-04-13", "endDate": "2020-04-19", "timesheetLines": [ { "date": "2020-04-13", "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27", "numberOfUnits": 8 }, { "date": "2020-04-15", "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27", "numberOfUnits": 6 } ] } # Timesheet | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new timesheet
-    api_response = api_instance.create_timesheet(xero_tenant_id, timesheet)
+    api_response = api_instance.create_timesheet(xero_tenant_id, timesheet, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_timesheet: %s\n" % e)
@@ -1210,6 +1245,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet** | [**Timesheet**](Timesheet.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1227,7 +1263,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_timesheet_line**
-> TimesheetLineObject create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line)
+> TimesheetLineObject create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line, idempotency_key=idempotency_key)
 
 Creates a new timesheet line for a specific timesheet using a unique timesheet ID
 
@@ -1260,9 +1296,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
 timesheet_line = { "date": "2020-04-14", "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27", "numberOfUnits": 1 } # TimesheetLine | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a new timesheet line for a specific timesheet using a unique timesheet ID
-    api_response = api_instance.create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line)
+    api_response = api_instance.create_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->create_timesheet_line: %s\n" % e)
@@ -1275,6 +1312,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
  **timesheet_line** | [**TimesheetLine**](TimesheetLine.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4037,7 +4075,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **revert_timesheet**
-> TimesheetObject revert_timesheet(xero_tenant_id, timesheet_id)
+> TimesheetObject revert_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
 
 Reverts a specific timesheet to draft
 
@@ -4069,9 +4107,10 @@ api_instance = PayrollUkApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Reverts a specific timesheet to draft
-    api_response = api_instance.revert_timesheet(xero_tenant_id, timesheet_id)
+    api_response = api_instance.revert_timesheet(xero_tenant_id, timesheet_id, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->revert_timesheet: %s\n" % e)
@@ -4083,6 +4122,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4100,7 +4140,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee**
-> EmployeeObject update_employee(xero_tenant_id, employee_id, employee)
+> EmployeeObject update_employee(xero_tenant_id, employee_id, employee, idempotency_key=idempotency_key)
 
 Updates a specific employee's detail
 
@@ -4133,9 +4173,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee = { "title": "Mr.", "firstName": "TestDataUK", "lastName": "Tester", "dateOfBirth": "1992-11-22T00:00:00", "gender": "M", "email": "tester@gmail.com", "phoneNumber": "0400123456", "isOffPayrollWorker": false, "address": { "addressLine1": "171 Midsummer", "city": "Milton Keyness", "postCode": "MK9 1EB" } } # Employee | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific employee's detail
-    api_response = api_instance.update_employee(xero_tenant_id, employee_id, employee)
+    api_response = api_instance.update_employee(xero_tenant_id, employee_id, employee, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_employee: %s\n" % e)
@@ -4148,6 +4189,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee** | [**Employee**](Employee.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4165,7 +4207,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_earnings_template**
-> EarningsTemplateObject update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template)
+> EarningsTemplateObject update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template, idempotency_key=idempotency_key)
 
 Updates a specific employee's earnings template records
 
@@ -4199,9 +4241,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 pay_template_earning_id = '3fa85f64-5717-4562-b3fc-2c963f66afa6' # str | Id for single pay template earnings object
 earnings_template = { "ratePerUnit": 30, "numberOfUnits": 4, "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27" } # EarningsTemplate | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific employee's earnings template records
-    api_response = api_instance.update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template)
+    api_response = api_instance.update_employee_earnings_template(xero_tenant_id, employee_id, pay_template_earning_id, earnings_template, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_employee_earnings_template: %s\n" % e)
@@ -4215,6 +4258,7 @@ Name | Type | Description  | Notes
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **pay_template_earning_id** | [**str**](.md)| Id for single pay template earnings object | 
  **earnings_template** | [**EarningsTemplate**](EarningsTemplate.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4232,7 +4276,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_leave**
-> EmployeeLeaveObject update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave)
+> EmployeeLeaveObject update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave, idempotency_key=idempotency_key)
 
 Updates a specific employee's leave records
 
@@ -4266,9 +4310,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 leave_id = 'c4be24e5-e840-4c92-9eaa-2d86cd596314' # str | Leave id for single object
 employee_leave = { "leaveTypeID": "ed08dffe-788e-4b24-9630-f0fa2f4d164c", "description": "Creating a Description", "startDate": "2020-04-24", "endDate": "2020-04-26", "periods": [ { "periodStartDate": "2020-04-20", "periodEndDate": "2020-04-26", "numberOfUnits": 1, "periodStatus": "Approved" } ] } # EmployeeLeave | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific employee's leave records
-    api_response = api_instance.update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave)
+    api_response = api_instance.update_employee_leave(xero_tenant_id, employee_id, leave_id, employee_leave, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_employee_leave: %s\n" % e)
@@ -4282,6 +4327,7 @@ Name | Type | Description  | Notes
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **leave_id** | [**str**](.md)| Leave id for single object | 
  **employee_leave** | [**EmployeeLeave**](EmployeeLeave.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4299,7 +4345,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_opening_balances**
-> EmployeeOpeningBalancesObject update_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances)
+> EmployeeOpeningBalancesObject update_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances, idempotency_key=idempotency_key)
 
 Updates a specific employee's opening balances
 
@@ -4332,9 +4378,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 employee_opening_balances = { "statutoryAdoptionPay": 20, "statutoryMaternityPay": 20, "statutoryPaternityPay": 20, "statutorySharedParentalPay": 20, "statutorySickPay": 20, "priorEmployeeNumber": 20 } # EmployeeOpeningBalances | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific employee's opening balances
-    api_response = api_instance.update_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances)
+    api_response = api_instance.update_employee_opening_balances(xero_tenant_id, employee_id, employee_opening_balances, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_employee_opening_balances: %s\n" % e)
@@ -4347,6 +4394,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **employee_opening_balances** | [**EmployeeOpeningBalances**](EmployeeOpeningBalances.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4364,7 +4412,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_employee_salary_and_wage**
-> SalaryAndWageObject update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage)
+> SalaryAndWageObject update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage, idempotency_key=idempotency_key)
 
 Updates salary and wages record for a specific employee
 
@@ -4398,9 +4446,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 employee_id = '4ff1e5cc-9835-40d5-bb18-09fdb118db9c' # str | Employee id for single object
 salary_and_wages_id = '3fa85f64-5717-4562-b3fc-2c963f66afa6' # str | Id for single pay template earnings object
 salary_and_wage = { "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27", "numberOfUnitsPerWeek": 3, "ratePerUnit": 11, "effectiveFrom": "2020-05-15", "annualSalary": 101, "status": "ACTIVE", "paymentType": "Salary" } # SalaryAndWage | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates salary and wages record for a specific employee
-    api_response = api_instance.update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage)
+    api_response = api_instance.update_employee_salary_and_wage(xero_tenant_id, employee_id, salary_and_wages_id, salary_and_wage, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_employee_salary_and_wage: %s\n" % e)
@@ -4414,6 +4463,7 @@ Name | Type | Description  | Notes
  **employee_id** | [**str**](.md)| Employee id for single object | 
  **salary_and_wages_id** | [**str**](.md)| Id for single pay template earnings object | 
  **salary_and_wage** | [**SalaryAndWage**](SalaryAndWage.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4431,7 +4481,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_pay_run**
-> PayRunObject update_pay_run(xero_tenant_id, pay_run_id, pay_run)
+> PayRunObject update_pay_run(xero_tenant_id, pay_run_id, pay_run, idempotency_key=idempotency_key)
 
 Updates a specific pay run
 
@@ -4464,9 +4514,10 @@ api_instance = PayrollUkApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 pay_run_id = 'pay_run_id_example' # str | Identifier for the pay run
 pay_run = { "paymentDate": "2020-05-01" } # PayRun | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific pay run
-    api_response = api_instance.update_pay_run(xero_tenant_id, pay_run_id, pay_run)
+    api_response = api_instance.update_pay_run(xero_tenant_id, pay_run_id, pay_run, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_pay_run: %s\n" % e)
@@ -4479,6 +4530,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **pay_run_id** | [**str**](.md)| Identifier for the pay run | 
  **pay_run** | [**PayRun**](PayRun.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -4496,7 +4548,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_timesheet_line**
-> TimesheetLineObject update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line)
+> TimesheetLineObject update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line, idempotency_key=idempotency_key)
 
 Updates a specific timesheet line for a specific timesheet
 
@@ -4530,9 +4582,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 timesheet_id = 'timesheet_id_example' # str | Identifier for the timesheet
 timesheet_line_id = 'timesheet_line_id_example' # str | Identifier for the timesheet line
 timesheet_line = { "date": "2020-04-14", "earningsRateID": "87f5b43a-cf51-4b74-92de-94c819e82d27", "numberOfUnits": 2 } # TimesheetLine | 
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific timesheet line for a specific timesheet
-    api_response = api_instance.update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line)
+    api_response = api_instance.update_timesheet_line(xero_tenant_id, timesheet_id, timesheet_line_id, timesheet_line, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling PayrollUkApi->update_timesheet_line: %s\n" % e)
@@ -4546,6 +4599,7 @@ Name | Type | Description  | Notes
  **timesheet_id** | [**str**](.md)| Identifier for the timesheet | 
  **timesheet_line_id** | [**str**](.md)| Identifier for the timesheet line | 
  **timesheet_line** | [**TimesheetLine**](TimesheetLine.md)|  | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
diff --git a/xero_python/project/api/project_api.py b/xero_python/project/api/project_api.py
index 0dd5ede6..dc2edad9 100644
--- a/xero_python/project/api/project_api.py
+++ b/xero_python/project/api/project_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.38.0
+    OpenAPI spec version: 2.40.1
 """
 
 import importlib
@@ -60,6 +60,7 @@ def create_project(
         self,
         xero_tenant_id,
         project_create_or_update,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -68,6 +69,7 @@ def create_project(
         OAuth2 scope: projects
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param ProjectCreateOrUpdate project_create_or_update: Create a new project with ProjectCreateOrUpdate object (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -96,6 +98,9 @@ def create_project(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -140,6 +145,7 @@ def create_task(
         xero_tenant_id,
         project_id,
         task_create_or_update,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -150,6 +156,7 @@ def create_task(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str project_id: You can create a task on a specified projectId (required)
         :param TaskCreateOrUpdate task_create_or_update: The task object you are creating (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -186,6 +193,9 @@ def create_task(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -230,6 +240,7 @@ def create_time_entry(
         xero_tenant_id,
         project_id,
         time_entry_create_or_update,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -240,6 +251,7 @@ def create_time_entry(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str project_id: You can specify an individual project by appending the projectId to the endpoint (required)
         :param TimeEntryCreateOrUpdate time_entry_create_or_update: The time entry object you are creating (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -276,6 +288,9 @@ def create_time_entry(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1163,6 +1178,7 @@ def patch_project(
         xero_tenant_id,
         project_id,
         project_patch,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1173,6 +1189,7 @@ def patch_project(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str project_id: You can specify an individual project by appending the projectId to the endpoint (required)
         :param ProjectPatch project_patch: Update the status of an existing Project (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1209,6 +1226,9 @@ def patch_project(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1253,6 +1273,7 @@ def update_project(
         xero_tenant_id,
         project_id,
         project_create_or_update,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1263,6 +1284,7 @@ def update_project(
         :param str xero_tenant_id: Xero identifier for Tenant (required)
         :param str project_id: You can specify an individual project by appending the projectId to the endpoint (required)
         :param ProjectCreateOrUpdate project_create_or_update: Request of type ProjectCreateOrUpdate (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1299,6 +1321,9 @@ def update_project(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1344,6 +1369,7 @@ def update_task(
         project_id,
         task_id,
         task_create_or_update,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1355,6 +1381,7 @@ def update_task(
         :param str project_id: You can specify an individual project by appending the projectId to the endpoint (required)
         :param str task_id: You can specify an individual task by appending the id to the endpoint (required)
         :param TaskCreateOrUpdate task_create_or_update: The task object you are updating (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1397,6 +1424,9 @@ def update_task(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
@@ -1442,6 +1472,7 @@ def update_time_entry(
         project_id,
         time_entry_id,
         time_entry_create_or_update,
+        idempotency_key=empty,
         _return_http_data_only=True,
         _preload_content=True,
         _request_timeout=None,
@@ -1453,6 +1484,7 @@ def update_time_entry(
         :param str project_id: You can specify an individual project by appending the projectId to the endpoint (required)
         :param str time_entry_id: You can specify an individual time entry by appending the id to the endpoint (required)
         :param TimeEntryCreateOrUpdate time_entry_create_or_update: The time entry object you are updating (required)
+        :param str idempotency_key: This allows you to safely retry requests without the risk of duplicate processing. 128 character max.
         :param bool _return_http_data_only: return received data only
         :param bool _preload_content: load received data in models
         :param bool _request_timeout: maximum wait time for response
@@ -1496,6 +1528,9 @@ def update_time_entry(
             "Xero-Tenant-Id": xero_tenant_id,
         }
 
+        if idempotency_key is not empty:
+            header_params["Idempotency-Key"] = idempotency_key
+
         local_var_files = {}
         form_params = []
 
diff --git a/xero_python/project/docs/ProjectApi.md b/xero_python/project/docs/ProjectApi.md
index 502d2da8..af542f1a 100644
--- a/xero_python/project/docs/ProjectApi.md
+++ b/xero_python/project/docs/ProjectApi.md
@@ -23,7 +23,7 @@ Method | HTTP request | Description
 
 
 # **create_project**
-> Project create_project(xero_tenant_id, project_create_or_update)
+> Project create_project(xero_tenant_id, project_create_or_update, idempotency_key=idempotency_key)
 
 Create one or more new projects
 
@@ -55,9 +55,10 @@ api_instance = ProjectApi(api_client)
 
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_create_or_update = { "contactId": "00000000-0000-0000-000-000000000000", "name": "New Kitchen", "deadlineUtc": "2019-12-10T12:59:59Z", "estimateAmount": "99.99" } # ProjectCreateOrUpdate | Create a new project with ProjectCreateOrUpdate object
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Create one or more new projects
-    api_response = api_instance.create_project(xero_tenant_id, project_create_or_update)
+    api_response = api_instance.create_project(xero_tenant_id, project_create_or_update, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling ProjectApi->create_project: %s\n" % e)
@@ -69,6 +70,7 @@ Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **project_create_or_update** | [**ProjectCreateOrUpdate**](ProjectCreateOrUpdate.md)| Create a new project with ProjectCreateOrUpdate object | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -86,7 +88,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_task**
-> Task create_task(xero_tenant_id, project_id, task_create_or_update)
+> Task create_task(xero_tenant_id, project_id, task_create_or_update, idempotency_key=idempotency_key)
 
 Allows you to create a task
 
@@ -121,9 +123,10 @@ api_instance = ProjectApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_id = 'project_id_example' # str | You can create a task on a specified projectId
 task_create_or_update = { "status": "INPROGRESS" } # TaskCreateOrUpdate | The task object you are creating
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Allows you to create a task
-    api_response = api_instance.create_task(xero_tenant_id, project_id, task_create_or_update)
+    api_response = api_instance.create_task(xero_tenant_id, project_id, task_create_or_update, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling ProjectApi->create_task: %s\n" % e)
@@ -136,6 +139,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **project_id** | [**str**](.md)| You can create a task on a specified projectId | 
  **task_create_or_update** | [**TaskCreateOrUpdate**](TaskCreateOrUpdate.md)| The task object you are creating | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -153,7 +157,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_time_entry**
-> TimeEntry create_time_entry(xero_tenant_id, project_id, time_entry_create_or_update)
+> TimeEntry create_time_entry(xero_tenant_id, project_id, time_entry_create_or_update, idempotency_key=idempotency_key)
 
 Creates a time entry for a specific project
 
@@ -188,9 +192,10 @@ api_instance = ProjectApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_id = 'project_id_example' # str | You can specify an individual project by appending the projectId to the endpoint
 time_entry_create_or_update = { "userId": "00000000-0000-0000-0000-000000000000", "taskId": "00000000-0000-0000-0000-000000000000", "dateUtc": "2020-02-26T15:00:00Z", "duration":30, "description": "My description" } # TimeEntryCreateOrUpdate | The time entry object you are creating
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Creates a time entry for a specific project
-    api_response = api_instance.create_time_entry(xero_tenant_id, project_id, time_entry_create_or_update)
+    api_response = api_instance.create_time_entry(xero_tenant_id, project_id, time_entry_create_or_update, idempotency_key=idempotency_key)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling ProjectApi->create_time_entry: %s\n" % e)
@@ -203,6 +208,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **project_id** | [**str**](.md)| You can specify an individual project by appending the projectId to the endpoint | 
  **time_entry_create_or_update** | [**TimeEntryCreateOrUpdate**](TimeEntryCreateOrUpdate.md)| The time entry object you are creating | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -849,7 +855,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **patch_project**
-> patch_project(xero_tenant_id, project_id, project_patch)
+> patch_project(xero_tenant_id, project_id, project_patch, idempotency_key=idempotency_key)
 
 creates a project for the specified contact
 
@@ -884,9 +890,10 @@ api_instance = ProjectApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_id = 'project_id_example' # str | You can specify an individual project by appending the projectId to the endpoint
 project_patch = { "status": "INPROGRESS" } # ProjectPatch | Update the status of an existing Project
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # creates a project for the specified contact
-    api_instance.patch_project(xero_tenant_id, project_id, project_patch)
+    api_instance.patch_project(xero_tenant_id, project_id, project_patch, idempotency_key=idempotency_key)
 except ApiException as e:
     print("Exception when calling ProjectApi->patch_project: %s\n" % e)
 ```
@@ -898,6 +905,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **project_id** | [**str**](.md)| You can specify an individual project by appending the projectId to the endpoint | 
  **project_patch** | [**ProjectPatch**](ProjectPatch.md)| Update the status of an existing Project | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -915,7 +923,7 @@ void (empty response body)
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_project**
-> update_project(xero_tenant_id, project_id, project_create_or_update)
+> update_project(xero_tenant_id, project_id, project_create_or_update, idempotency_key=idempotency_key)
 
 Updates a specific project
 
@@ -950,9 +958,10 @@ api_instance = ProjectApi(api_client)
 xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_id = 'project_id_example' # str | You can specify an individual project by appending the projectId to the endpoint
 project_create_or_update = { "name": "New Kitchen", "deadlineUtc": "2017-04-23T18:25:43.511Z", "estimateAmount": 99.99 } # ProjectCreateOrUpdate | Request of type ProjectCreateOrUpdate
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a specific project
-    api_instance.update_project(xero_tenant_id, project_id, project_create_or_update)
+    api_instance.update_project(xero_tenant_id, project_id, project_create_or_update, idempotency_key=idempotency_key)
 except ApiException as e:
     print("Exception when calling ProjectApi->update_project: %s\n" % e)
 ```
@@ -964,6 +973,7 @@ Name | Type | Description  | Notes
  **xero_tenant_id** | **str**| Xero identifier for Tenant | 
  **project_id** | [**str**](.md)| You can specify an individual project by appending the projectId to the endpoint | 
  **project_create_or_update** | [**ProjectCreateOrUpdate**](ProjectCreateOrUpdate.md)| Request of type ProjectCreateOrUpdate | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -981,7 +991,7 @@ void (empty response body)
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_task**
-> update_task(xero_tenant_id, project_id, task_id, task_create_or_update)
+> update_task(xero_tenant_id, project_id, task_id, task_create_or_update, idempotency_key=idempotency_key)
 
 Allows you to update a task
 
@@ -1017,9 +1027,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_id = 'project_id_example' # str | You can specify an individual project by appending the projectId to the endpoint
 task_id = 'task_id_example' # str | You can specify an individual task by appending the id to the endpoint
 task_create_or_update = xero_python.project.TaskCreateOrUpdate() # TaskCreateOrUpdate | The task object you are updating
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Allows you to update a task
-    api_instance.update_task(xero_tenant_id, project_id, task_id, task_create_or_update)
+    api_instance.update_task(xero_tenant_id, project_id, task_id, task_create_or_update, idempotency_key=idempotency_key)
 except ApiException as e:
     print("Exception when calling ProjectApi->update_task: %s\n" % e)
 ```
@@ -1032,6 +1043,7 @@ Name | Type | Description  | Notes
  **project_id** | [**str**](.md)| You can specify an individual project by appending the projectId to the endpoint | 
  **task_id** | [**str**](.md)| You can specify an individual task by appending the id to the endpoint | 
  **task_create_or_update** | [**TaskCreateOrUpdate**](TaskCreateOrUpdate.md)| The task object you are updating | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type
 
@@ -1049,7 +1061,7 @@ void (empty response body)
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_time_entry**
-> update_time_entry(xero_tenant_id, project_id, time_entry_id, time_entry_create_or_update)
+> update_time_entry(xero_tenant_id, project_id, time_entry_id, time_entry_create_or_update, idempotency_key=idempotency_key)
 
 Updates a time entry for a specific project
 
@@ -1085,9 +1097,10 @@ xero_tenant_id = 'xero_tenant_id_example' # str | Xero identifier for Tenant
 project_id = 'project_id_example' # str | You can specify an individual project by appending the projectId to the endpoint
 time_entry_id = 'time_entry_id_example' # str | You can specify an individual time entry by appending the id to the endpoint
 time_entry_create_or_update = { "userId": "00000000-0000-0000-0000-000000000000", "taskId": "00000000-0000-0000-0000-000000000000", "dateUtc": "2020-02-27T15:00:00Z", "duration":45, "description": "My UPDATED description" } # TimeEntryCreateOrUpdate | The time entry object you are updating
+idempotency_key = 'KEY_VALUE' # str | This allows you to safely retry requests without the risk of duplicate processing. 128 character max. (optional)
 try:
     # Updates a time entry for a specific project
-    api_instance.update_time_entry(xero_tenant_id, project_id, time_entry_id, time_entry_create_or_update)
+    api_instance.update_time_entry(xero_tenant_id, project_id, time_entry_id, time_entry_create_or_update, idempotency_key=idempotency_key)
 except ApiException as e:
     print("Exception when calling ProjectApi->update_time_entry: %s\n" % e)
 ```
@@ -1100,6 +1113,7 @@ Name | Type | Description  | Notes
  **project_id** | [**str**](.md)| You can specify an individual project by appending the projectId to the endpoint | 
  **time_entry_id** | [**str**](.md)| You can specify an individual time entry by appending the id to the endpoint | 
  **time_entry_create_or_update** | [**TimeEntryCreateOrUpdate**](TimeEntryCreateOrUpdate.md)| The time entry object you are updating | 
+ **idempotency_key** | **str**| This allows you to safely retry requests without the risk of duplicate processing. 128 character max. | [optional] 
 
 ### Return type