In this article, you will be able to understand the meaning of the response codes that are issued when paying with Visa or MasterCard.
The Address Verification System (or AVS) is a service set up by credit card processors that allow merchants to verify the ownership of a card when it is used online by a customer.
AVS Response Codes for Visa and MasterCard
| Code | Reason | Explication |
| A | Address | Contains address only (without zip code). |
| B | International "A" |
Contains address only (without zip code). |
| C | International "N" | Transaction declined because some parameter entered is not correct. |
| D | International "X" | Contains address and zip code. |
| E | Not allowed for MOTO (Internet/Phone) transactions | Transaction declined because it cannot be performed by mobile device. |
| F | UK-specific "X" | Contains address and zip code. |
| G | Global Unavailable |
Card not available globally. |
| I | International Unavailable | International card not available. |
| M | Address | Contains address and zip code. |
| N | No match | Transaction declined because some parameter entered is not correct. |
| P | Postal (International "Z") | Contains zip code only (no address). |
| R | Retry | Retry transaction. |
| S | Service not Supported | Service is not supported by that brand. |
| U | Unavailable | Card not available. |
| W | Whole ZIP | Contiene código postal de 9 dígitos (sin dirección). |
| X | Exact match | Contains 9-digit ZIP code (no address). |
| Y | Yes | Contains address and 5-digit postal code. |
| Z | ZIP | Contains 5-digit zip code (no address). |
| All others | Error | Error trying to process transaction. |
CVV2 response codes for Visa and MasterCard
| Code | Reason | Explication |
| E | Error - Unrecognized or Unknown response | Transaction failed and could not be processed. |
| I | Invalid or Null | Invalid or void card. |
| M | Match | CVV/CSC match. |
| N | No match | CVV/CSC does not match. |
| P | Not processed | Card could not be processed. |
| S | Service not supported | The service is not allowed by that brand. |
| U | Unknown - Issuer is not certified | Card issuer is not certified. |
| X | No response | No response from the issuer. |
| All others | Error | Error while trying to process the transaction. |
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