Response to an Unsuccessful Request {#visa-bank-acc-val-uns-resp-fields-exp}
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It is important to understand the fields that are contained in a response to an unsuccessful request. These fields provide information that identify and resolve unsuccessful requests.  
The response to an unsuccessful request contains these fields:

* v-c-correlationid: The response header includes a unique identifier for this validation request.
* submitTimeUtc: The timestamp of the validation request. The format is `YYYY-MM-DDThhmmssZ`.
* message: The detailed message related to the status and reason for the response.

For more information about response codes, see [Transaction response codes](https://developer.visaacceptance.com/api/reference/response-codes.md "").

HTTP Status Codes for an Unsuccessful Request {#visa-bank-acc-val-unsuc-response-codes}
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These are the possible values you can receive for a status, reason, and details block depending on the HTTP status code:

| HTTP Status Code (part of HTTP header) | Status            | Reason                                                                  | Details (an array with 0 to many blocks)                                                                 |
|:---------------------------------------|:------------------|:------------------------------------------------------------------------|:---------------------------------------------------------------------------------------------------------|
| `400`                                  | INVALID_ REQUEST  | INVALID_REQUEST                                                         | Field contains the name of the field that is missing or incorrect: Reason -- MISSING_FIELD, INVALID_DATA |
| `403`                                  | UNAUTHORIZED      | UNAUTHORIZED                                                            | ---                                                                                                      |
| `404`                                  | NOT_FOUND         | NOT_FOUND                                                               | ---                                                                                                      |
| `422`                                  | VALIDATION_ ERROR | PRODUCT_INACTIVE INVALID_MERCHANT_ CONFIGURATION PRODUCT_NOT_CONFIGURED | ---                                                                                                      |
| `502`                                  | SERVER_ERROR      | SYSTEM_ERROR SERVER_TIMEOUT SERVICE_TIMEOUT                             | ---                                                                                                      |
[HTTP Status Codes]