diff --git a/unit/models/transaction.py b/unit/models/transaction.py
index 6fa0a88..59e2d17 100644
--- a/unit/models/transaction.py
+++ b/unit/models/transaction.py
@@ -482,7 +482,8 @@ def from_json_api(_id, _type, attributes, relationships):
                        InterestTransactionDTO, DisputeTransactionDTO, CheckDepositTransactionDTO,
                        ReturnedCheckDepositTransactionDTO, CheckPaymentTransactionDTO,
                        ReturnedCheckPaymentTransactionDTO, PaymentAdvanceTransactionDTO,
-                       RepaidPaymentAdvanceTransactionDTO, AccountLowBalanceClosureTransactionDTO, NegativeBalanceCoverageTransactionDTO]
+                       RepaidPaymentAdvanceTransactionDTO, AccountLowBalanceClosureTransactionDTO, NegativeBalanceCoverageTransactionDTO,
+                       WriteOffTransactionDTO]
 
 
 class PatchTransactionRequest(BaseTransactionDTO, UnitRequest):