# Address Verification Service (AVS) Codes

The Address Verification Service (AVS) allows card-not-present merchants to verify a cardholder's billing address with the card issuer to reduce risk exposure. An AVS request includes the billing address provided by the cardholder (street address and/or postal code).

The AVS verification result is returned in the **`avsResultCode`** field of payment API responses.

| Code | Description |
|  --- | --- |
| A | Street address matches, but postal code does not match |
| N | Street address and postal code do not match |
| Y | Street address and postal code both match |
| Z | Postal code matches, but street address does not match |
| R | AVS check was unavailable or timed out |
| U | Address information is unavailable from issuer |
| S | AVS not supported by card issuer |
| FMT | Address or postal code in invalid format |
| C1 | Cardholder name matches |
| C2 | Cardholder name, street address, and postal code all match |
| C3 | Cardholder name and street address match, but postal code does not match |
| C4 | Cardholder name and postal code match, but street address does not match |
| C5 | Cardholder name does not match, but street address matches |
| C6 | Cardholder name does not match, but postal code matches |
| C7 | Cardholder name does not match, but street address and postal code match |
| C8 | Cardholder name, street address, and postal code all do not match |
| UNK | Unknown or unmapped processor AVS response. The verification result is not recognized, not mapped, or not provided by the processor |