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AVS Response Codes

The address verification service (AVS) is offered as part of the Visa, Mastercard, Discover and Amex network.

The AVS response will not impact the approval or decline of a transaction, but can help as an indicator for merchants on whether they should proceed with the transaction. Although the street address can sometimes be tricky to match, the postal/zip code is usually a more accurate indicator. AVS is mostly supported by banks throughout Canada, the United States and the United Kingdom. Most card issuers outside of those countries do not participate in the address verification service.

You can configure your AVS settings for transactions in your Helcim account using your security settings. Learn more here.

AVS Response Code Description
A Address (Street) matches, Zip does not.
B Street address match, Postal code in wrong format. (international issuer)
C Street address and postal code in wrong formats
D Street address and postal code match (international issuer)
E AVS error
F Address does compare and five-digit ZIP code does compare (UK only).
G Card issued by a non-US issuer that does not participate in the AVS System
I Address information not verified by international issuer.
M Street Address and Postal code match (international issuer)
N No Match on Address (Street) or Zip
P Postal codes match, Street address not verified due to incompatible formats.
R Retry, System unavailable or Timed out
S Service not supported by issuer
U Address information is unavailable (domestic issuer)
W 9 digit Zip matches, Address (Street) does not
X Exact AVS Match
Y Address (Street) and 5 digit Zip match
Z 5 digit Zip matches, Address (Street) does not

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