diff --git a/plenum/server/request_handlers/txn_author_agreement_handler.py b/plenum/server/request_handlers/txn_author_agreement_handler.py
index 5c8a829e8c..c7fb6d11c2 100644
--- a/plenum/server/request_handlers/txn_author_agreement_handler.py
+++ b/plenum/server/request_handlers/txn_author_agreement_handler.py
@@ -1,3 +1,4 @@
+from datetime import datetime
 from typing import Optional
 
 from common.exceptions import LogicError
@@ -19,7 +20,12 @@ def __init__(self, database_manager: DatabaseManager):
         super().__init__(database_manager, TXN_AUTHOR_AGREEMENT, CONFIG_LEDGER_ID)
 
     def static_validation(self, request: Request):
-        pass
+        self._validate_request_type(request)
+        operation, identifier, req_id = request.operation, request.identifier, request.reqId
+        self._validate_ts(operation.get(TXN_AUTHOR_AGREEMENT_RETIREMENT_TS),
+                          identifier, req_id, TXN_AUTHOR_AGREEMENT_RETIREMENT_TS)
+        self._validate_ts(operation.get(TXN_AUTHOR_AGREEMENT_RATIFICATION_TS),
+                          identifier, req_id, TXN_AUTHOR_AGREEMENT_RATIFICATION_TS)
 
     def dynamic_validation(self, request: Request, req_pp_time: Optional[int]):
         self._validate_request_type(request)
@@ -134,3 +140,12 @@ def _validate_update_taa(self, request, digest):
         if last_taa_digest == digest:
             raise InvalidClientRequest(request.identifier, request.reqId,
                                        "The latest transaction author agreement cannot be retired.")
+
+    def _validate_ts(self, ts, identifier, req_id, field_name):
+        if not ts:
+            return
+        try:
+            datetime.utcfromtimestamp(ts)
+        except ValueError:
+            raise InvalidClientRequest(identifier, req_id,
+                                       "{} = {} is out of range.".format(field_name, ts))
diff --git a/plenum/server/request_managers/write_request_manager.py b/plenum/server/request_managers/write_request_manager.py
index 37c6768377..bf2c796703 100644
--- a/plenum/server/request_managers/write_request_manager.py
+++ b/plenum/server/request_managers/write_request_manager.py
@@ -346,7 +346,12 @@ def do_taa_validation(self, request: Request, req_pp_time: int, config):
             )
 
         r_taa_a_ts = request.taaAcceptance[f.TAA_ACCEPTANCE_TIME.nm]
-        datetime_r_taa = datetime.utcfromtimestamp(r_taa_a_ts)
+        try:
+            datetime_r_taa = datetime.utcfromtimestamp(r_taa_a_ts)
+        except ValueError:
+            raise InvalidClientTaaAcceptanceError(
+                request.identifier, request.reqId,
+                "TAA_ACCEPTANCE_TIME = {} is out of range".format(r_taa_a_ts))
         if datetime_r_taa.time() != time(0):
             raise InvalidClientTaaAcceptanceError(
                 request.identifier, request.reqId,
diff --git a/plenum/test/txn_author_agreement/acceptance/test_taa_acceptance_validation.py b/plenum/test/txn_author_agreement/acceptance/test_taa_acceptance_validation.py
index 68ed60ca41..2a400b4638 100644
--- a/plenum/test/txn_author_agreement/acceptance/test_taa_acceptance_validation.py
+++ b/plenum/test/txn_author_agreement/acceptance/test_taa_acceptance_validation.py
@@ -106,6 +106,21 @@ def test_taa_acceptance_mechanism_inappropriate(
         validate_taa_acceptance(request_dict)
 
 
+def test_taa_acceptance_with_incorrect_time(
+    validate_taa_acceptance, validation_error,
+    request_dict
+):
+    request_dict[f.TAA_ACCEPTANCE.nm][f.TAA_ACCEPTANCE_TIME.nm] *= 1000
+    with pytest.raises(
+        validation_error,
+        match=(
+            r"TAA_ACCEPTANCE_TIME = {} is "
+            r"out of range.".format(request_dict[f.TAA_ACCEPTANCE.nm][f.TAA_ACCEPTANCE_TIME.nm])
+        )
+    ):
+        validate_taa_acceptance(request_dict)
+
+
 def test_taa_acceptance_time_near_lower_threshold(
     tconf, txnPoolNodeSet, validate_taa_acceptance, validation_error,
     turn_off_freshness_state_update, max_last_accepted_pre_prepare_time,
diff --git a/plenum/test/txn_author_agreement/test_txn_author_agreement.py b/plenum/test/txn_author_agreement/test_txn_author_agreement.py
index 31d32dd91e..c0f36ae484 100644
--- a/plenum/test/txn_author_agreement/test_txn_author_agreement.py
+++ b/plenum/test/txn_author_agreement/test_txn_author_agreement.py
@@ -97,6 +97,29 @@ def test_create_txn_author_agreement_with_ratified_from_future_fails(looper, set
                                       ratified=get_utc_epoch() + 600)
 
 
+def test_create_txn_author_agreement_with_milliseconds_ratified_fails(looper, set_txn_author_agreement_aml,
+                                                                     sdk_pool_handle, sdk_wallet_trustee):
+    ratified = get_utc_epoch() * 1000
+    with pytest.raises(RequestNackedException,
+                       match="{} = {} is out of range.".format(TXN_AUTHOR_AGREEMENT_RATIFICATION_TS, ratified)):
+        sdk_send_txn_author_agreement(looper, sdk_pool_handle, sdk_wallet_trustee,
+                                      version=randomString(16),
+                                      text=randomString(1024),
+                                      ratified=ratified)
+
+
+def test_create_txn_author_agreement_with_milliseconds_retired_fails(looper, set_txn_author_agreement_aml,
+                                                                     sdk_pool_handle, sdk_wallet_trustee):
+    retired = get_utc_epoch() * 1000
+    with pytest.raises(RequestNackedException,
+                       match="{} = {} is out of range.".format(TXN_AUTHOR_AGREEMENT_RETIREMENT_TS, retired)):
+        sdk_send_txn_author_agreement(looper, sdk_pool_handle, sdk_wallet_trustee,
+                                      version=randomString(16),
+                                      text=randomString(1024),
+                                      ratified=get_utc_epoch() - 600,
+                                      retired=retired)
+
+
 @pytest.mark.parametrize('retired_offset', [-600, 600])
 def test_create_txn_author_agreement_with_retired_date_fails(looper, set_txn_author_agreement_aml,
                                                              sdk_pool_handle, sdk_wallet_trustee,