AVS Response Codes
Address Verification Service (AVS) is a service provided by the payment brands that determines the match or partial match of the consumer's address information. The responses are returned to you during the authorization process via your transaction processing.
| Code | Visa | MasterCard | Discover | American Express |
| Y | Address & 5-digit or 9-digit ZIP match | Address & 5-digit ZIP match | Address only matches | Address & ZIP match |
| A | Address matches, ZIP does not | Address matches, ZIP does not | Address & 5-digit ZIP match | Address only matches |
| S | AVS not supported | AVS not supported | AVS not supported | AVS not supported |
| R | System unavailable, retry | System unavailable, retry | Not applicable | System unavailable, retry |
| U | Information not available | Information not available | System unavailable, retry | Information not available |
| Z | Either 5-digit or 9-digit ZIP match, address does not | 5-digit ZIP matches, address does not | 5-digit ZIP matches, address does not | ZIP code only matches |
| N | Neither ZIP nor address match | Neither ZIP nor address match | Neither ZIP nor address match | Neither ZIP nor address match |
| W | Not applicable | For U.S., 9-digit ZIP matches, address does not. For non-U.S., ZIP matches, address does not | Information not available | Not applicable |
| X | Not applicable | For U.S., all digits match. For non-U.S., ZIP and address match. | Address & 9-digit ZIP match | Not applicable |
| B | Address matches, ZIP not verified | Not applicable | Not applicable | Not applicable |
| T | Not applicable | Not applicable | 9-digit ZIP matches, address does not | Not applicable |
| P | ZIP matches, address not verified | Not applicable | Not applicable | Not applicable |
| C | Address and ZIP not verified | Not applicable | Not applicable | Not applicable |
| D | Address & ZIP match (International only) | Not applicable | Not applicable | Not applicable |
| G | Address not verified for International transaction (International only) | Not applicable | Not applicable | Not applicable |
| I | Address not verified (International only) | Not applicable | Not applicable | Not applicable |
| M | Address & ZIP match (International only) | Not applicable | Not applicable | Not applicable |
| F | Address & ZIP match (UK only) | Not applicable | Not applicable | Not applicable |
| O | Not applicable | Not applicable | Not applicable | Card holder name and address match. |
| E | Not applicable | Not applicable | Not applicable | Card holder name incorrect, address and postal code match. |
Maestro AVS Response Codes
| Code | Description |
| 2 | Part of the address information matched. |
| 3 | The merchant did not provide AVS information. Not processed. |
| 1 | None of the address information matched. |
| 4 | The merchant did not provide AVS information. Not processed. |
| U | The merchant did not provide AVS information. Not processed. |
| 0 | All the address information matched. |
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