# 401: Transaction result error

Refers to Status Code:

[FATAL](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/status_codes/#fatal)

Possible Reason Codes:

[250: Billing country not allowed](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/250)

[251: Delivery country not allowed](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/251)

[252: Country Code not valid](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/252)

[701: Merchant limit exceeded / Transaction result error](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/701)

[703: Request not successful](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/703)

[720: Declined - Payment attribute](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/720)

[721: Declined - Transaction risk](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/721)

[800: Customer not identified, manual check necessary](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/800)

[2000: Validation failed](/docs/developer/api_integration/payment_1.8/payment_api_documentation/responses/reason/2000)