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Status and Reason Codes

HTTP Status Codes

These HTTP status codes can appear during payer authentication.

CodeDescription
201: AUTHENTICATION_FAILEDEncountered a payer authentication problem. Payer could not be authenticated.
201: CONSUMER_AUTHENTICATION_REQUIREDEncountered a payer authentication problem. Payer could not be authenticated.
400: CONSUMER_AUTHENTICATION_FAILEDEncountered a payer authentication problem. Payer could not be authenticated.
400: INVALID_DATADeclined: One or more fields in the request contain invalid data.
400: INVALID_MERCHANT_CONFIGURATIONDeclined: There is a problem with your merchant configuration.
400: MISSING_FIELDDeclined: The request is missing one or more fields.
502: SYSTEM_ERRORError: General system failure. A system error occurred.
502: SYSTEM_TIMEOUTError: The request was received but a server timeout occurred. This error does not include timeouts between the client and the server.
502: SYSTEM_TIMEOUTError: The request was received, but a service did not finish running in time.

Last published: October 28, 2026

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