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Common AVS Response Code Letters
& Their Meanings!
| Letter | Meaning |
| Y |
Exact Match |
| N |
Not A Match |
| A |
Address Match Only |
| Z |
Zip Code Match Only |
| S |
Service Not Supported (often for non-US credit cards, get proof from cardholder via fax if possible) |
| U |
Address Information Not Available (call cardholder's issuing bank) |
| X |
When with "YY" means exact match. Otherwise, "XXU" means address Information Not Available (call cardholder's issuing bank) |
| R |
Retry--System Unavailable Or Timed Out |
| W |
Zip Code OK |
| E |
Error Response For Merchant Service Category Code |
Credit Card Company Phone Numbers!
| Company | Phone Number |
| Visa/MasterCard |
1-800-228-1122 |
| Discover Card |
1-800-347-1111 option 2 |
| American Express |
1-800-528-2121 option 3 |
| CardService International Merchant Services |
1-800-456-5989 |
| If do not use CardService International |
Contact Your Merchant Account Provider |
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