diff --git a/pyproject.toml b/pyproject.toml
index 55e65ed..dc84422 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "flagright"
-version = "1.6.24"
+version = "1.6.25"
 description = ""
 readme = "README.md"
 authors = []
diff --git a/src/flagright/__init__.py b/src/flagright/__init__.py
index 939e492..7c1d755 100644
--- a/src/flagright/__init__.py
+++ b/src/flagright/__init__.py
@@ -52,6 +52,7 @@
     CaseManagementEventCaseStatus,
     CaseManagementEventCaseStatusReason,
     CaseOpenedDetails,
+    CashDetails,
     CashPaymentMethod,
     CheckDeliveryStatus,
     CheckDetails,
@@ -354,6 +355,7 @@
     "CaseManagementEventCaseStatus",
     "CaseManagementEventCaseStatusReason",
     "CaseOpenedDetails",
+    "CashDetails",
     "CashPaymentMethod",
     "CheckDeliveryStatus",
     "CheckDetails",
diff --git a/src/flagright/core/client_wrapper.py b/src/flagright/core/client_wrapper.py
index 70eba87..fdadc2f 100644
--- a/src/flagright/core/client_wrapper.py
+++ b/src/flagright/core/client_wrapper.py
@@ -14,7 +14,7 @@ def get_headers(self) -> typing.Dict[str, str]:
         headers: typing.Dict[str, str] = {
             "X-Fern-Language": "Python",
             "X-Fern-SDK-Name": "flagright",
-            "X-Fern-SDK-Version": "1.6.24",
+            "X-Fern-SDK-Version": "1.6.25",
         }
         headers["x-api-key"] = self.api_key
         return headers
diff --git a/src/flagright/resources/business_users/types/business_saved_payment_details_item.py b/src/flagright/resources/business_users/types/business_saved_payment_details_item.py
index 257172b..0bf2182 100644
--- a/src/flagright/resources/business_users/types/business_saved_payment_details_item.py
+++ b/src/flagright/resources/business_users/types/business_saved_payment_details_item.py
@@ -8,6 +8,7 @@
 
 from ....types.ach_details import AchDetails
 from ....types.card_details import CardDetails
+from ....types.cash_details import CashDetails
 from ....types.check_details import CheckDetails
 from ....types.generic_bank_account_details import GenericBankAccountDetails
 from ....types.iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class BusinessSavedPaymentDetailsItem_Cash(CheckDetails):
+class BusinessSavedPaymentDetailsItem_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/__init__.py b/src/flagright/types/__init__.py
index ffd9e5e..f655108 100644
--- a/src/flagright/types/__init__.py
+++ b/src/flagright/types/__init__.py
@@ -55,6 +55,7 @@
 from .case_management_event_case_status import CaseManagementEventCaseStatus
 from .case_management_event_case_status_reason import CaseManagementEventCaseStatusReason
 from .case_opened_details import CaseOpenedDetails
+from .cash_details import CashDetails
 from .cash_payment_method import CashPaymentMethod
 from .check_delivery_status import CheckDeliveryStatus
 from .check_details import CheckDetails
@@ -336,6 +337,7 @@
     "CaseManagementEventCaseStatus",
     "CaseManagementEventCaseStatusReason",
     "CaseOpenedDetails",
+    "CashDetails",
     "CashPaymentMethod",
     "CheckDeliveryStatus",
     "CheckDetails",
diff --git a/src/flagright/types/business_optional_saved_payment_details_item.py b/src/flagright/types/business_optional_saved_payment_details_item.py
index 8b952fa..1b99cc7 100644
--- a/src/flagright/types/business_optional_saved_payment_details_item.py
+++ b/src/flagright/types/business_optional_saved_payment_details_item.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class BusinessOptionalSavedPaymentDetailsItem_Cash(CheckDetails):
+class BusinessOptionalSavedPaymentDetailsItem_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/business_with_rules_result_saved_payment_details_item.py b/src/flagright/types/business_with_rules_result_saved_payment_details_item.py
index ea0d22f..bc5407c 100644
--- a/src/flagright/types/business_with_rules_result_saved_payment_details_item.py
+++ b/src/flagright/types/business_with_rules_result_saved_payment_details_item.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class BusinessWithRulesResultSavedPaymentDetailsItem_Cash(CheckDetails):
+class BusinessWithRulesResultSavedPaymentDetailsItem_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/cash_details.py b/src/flagright/types/cash_details.py
new file mode 100644
index 0000000..a4cc7a9
--- /dev/null
+++ b/src/flagright/types/cash_details.py
@@ -0,0 +1,28 @@
+# This file was auto-generated by Fern from our API Definition.
+
+import datetime as dt
+import typing
+
+from ..core.datetime_utils import serialize_datetime
+
+try:
+    import pydantic.v1 as pydantic  # type: ignore
+except ImportError:
+    import pydantic  # type: ignore
+
+
+class CashDetails(pydantic.BaseModel):
+    identifier: typing.Optional[str] = pydantic.Field(description="Identifier for the cash transaction")
+
+    def json(self, **kwargs: typing.Any) -> str:
+        kwargs_with_defaults: typing.Any = {"by_alias": True, "exclude_unset": True, **kwargs}
+        return super().json(**kwargs_with_defaults)
+
+    def dict(self, **kwargs: typing.Any) -> typing.Dict[str, typing.Any]:
+        kwargs_with_defaults: typing.Any = {"by_alias": True, "exclude_unset": True, **kwargs}
+        return super().dict(**kwargs_with_defaults)
+
+    class Config:
+        frozen = True
+        smart_union = True
+        json_encoders = {dt.datetime: serialize_datetime}
diff --git a/src/flagright/types/check_details.py b/src/flagright/types/check_details.py
index 90fea59..9694de8 100644
--- a/src/flagright/types/check_details.py
+++ b/src/flagright/types/check_details.py
@@ -4,6 +4,9 @@
 import typing
 
 from ..core.datetime_utils import serialize_datetime
+from .address import Address
+from .check_delivery_status import CheckDeliveryStatus
+from .tag import Tag
 
 try:
     import pydantic.v1 as pydantic  # type: ignore
@@ -12,7 +15,15 @@
 
 
 class CheckDetails(pydantic.BaseModel):
-    identifier: typing.Optional[str] = pydantic.Field(description="Identifier for the cash transaction")
+    check_number: typing.Optional[str] = pydantic.Field(alias="checkNumber")
+    check_identifier: typing.Optional[str] = pydantic.Field(alias="checkIdentifier")
+    name: typing.Optional[str]
+    delivery_status: typing.Optional[CheckDeliveryStatus] = pydantic.Field(alias="deliveryStatus")
+    eta_timestamp: typing.Optional[float] = pydantic.Field(alias="etaTimestamp")
+    shipping_address: typing.Optional[Address] = pydantic.Field(alias="shippingAddress")
+    tags: typing.Optional[typing.List[Tag]] = pydantic.Field(
+        description="Additional information that can be added via tags"
+    )
 
     def json(self, **kwargs: typing.Any) -> str:
         kwargs_with_defaults: typing.Any = {"by_alias": True, "exclude_unset": True, **kwargs}
@@ -25,4 +36,5 @@ def dict(self, **kwargs: typing.Any) -> typing.Dict[str, typing.Any]:
     class Config:
         frozen = True
         smart_union = True
+        allow_population_by_field_name = True
         json_encoders = {dt.datetime: serialize_datetime}
diff --git a/src/flagright/types/transaction_destination_payment_details.py b/src/flagright/types/transaction_destination_payment_details.py
index 47ed4fa..165031b 100644
--- a/src/flagright/types/transaction_destination_payment_details.py
+++ b/src/flagright/types/transaction_destination_payment_details.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class TransactionDestinationPaymentDetails_Cash(CheckDetails):
+class TransactionDestinationPaymentDetails_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/transaction_origin_payment_details.py b/src/flagright/types/transaction_origin_payment_details.py
index fa37f30..2e0820c 100644
--- a/src/flagright/types/transaction_origin_payment_details.py
+++ b/src/flagright/types/transaction_origin_payment_details.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class TransactionOriginPaymentDetails_Cash(CheckDetails):
+class TransactionOriginPaymentDetails_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/transaction_updatable_destination_payment_details.py b/src/flagright/types/transaction_updatable_destination_payment_details.py
index 390ce7d..5a0dd9f 100644
--- a/src/flagright/types/transaction_updatable_destination_payment_details.py
+++ b/src/flagright/types/transaction_updatable_destination_payment_details.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class TransactionUpdatableDestinationPaymentDetails_Cash(CheckDetails):
+class TransactionUpdatableDestinationPaymentDetails_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/transaction_updatable_origin_payment_details.py b/src/flagright/types/transaction_updatable_origin_payment_details.py
index 461b9f0..e6b0931 100644
--- a/src/flagright/types/transaction_updatable_origin_payment_details.py
+++ b/src/flagright/types/transaction_updatable_origin_payment_details.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class TransactionUpdatableOriginPaymentDetails_Cash(CheckDetails):
+class TransactionUpdatableOriginPaymentDetails_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/transaction_with_rules_result_destination_payment_details.py b/src/flagright/types/transaction_with_rules_result_destination_payment_details.py
index 8d4d2c9..468b9e3 100644
--- a/src/flagright/types/transaction_with_rules_result_destination_payment_details.py
+++ b/src/flagright/types/transaction_with_rules_result_destination_payment_details.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class TransactionWithRulesResultDestinationPaymentDetails_Cash(CheckDetails):
+class TransactionWithRulesResultDestinationPaymentDetails_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/transaction_with_rules_result_origin_payment_details.py b/src/flagright/types/transaction_with_rules_result_origin_payment_details.py
index 9133cb6..786a488 100644
--- a/src/flagright/types/transaction_with_rules_result_origin_payment_details.py
+++ b/src/flagright/types/transaction_with_rules_result_origin_payment_details.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class TransactionWithRulesResultOriginPaymentDetails_Cash(CheckDetails):
+class TransactionWithRulesResultOriginPaymentDetails_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/user_optional_saved_payment_details_item.py b/src/flagright/types/user_optional_saved_payment_details_item.py
index a74fddf..cff2417 100644
--- a/src/flagright/types/user_optional_saved_payment_details_item.py
+++ b/src/flagright/types/user_optional_saved_payment_details_item.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class UserOptionalSavedPaymentDetailsItem_Cash(CheckDetails):
+class UserOptionalSavedPaymentDetailsItem_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/user_saved_payment_details_item.py b/src/flagright/types/user_saved_payment_details_item.py
index fca4af9..5ed9dec 100644
--- a/src/flagright/types/user_saved_payment_details_item.py
+++ b/src/flagright/types/user_saved_payment_details_item.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class UserSavedPaymentDetailsItem_Cash(CheckDetails):
+class UserSavedPaymentDetailsItem_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config:
diff --git a/src/flagright/types/user_with_rules_result_saved_payment_details_item.py b/src/flagright/types/user_with_rules_result_saved_payment_details_item.py
index aa50121..4d052b7 100644
--- a/src/flagright/types/user_with_rules_result_saved_payment_details_item.py
+++ b/src/flagright/types/user_with_rules_result_saved_payment_details_item.py
@@ -8,6 +8,7 @@
 
 from .ach_details import AchDetails
 from .card_details import CardDetails
+from .cash_details import CashDetails
 from .check_details import CheckDetails
 from .generic_bank_account_details import GenericBankAccountDetails
 from .iban_details import IbanDetails
@@ -98,7 +99,7 @@ class Config:
         allow_population_by_field_name = True
 
 
-class UserWithRulesResultSavedPaymentDetailsItem_Cash(CheckDetails):
+class UserWithRulesResultSavedPaymentDetailsItem_Cash(CashDetails):
     method: typing_extensions.Literal["CASH"]
 
     class Config: