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{{Refimprove|date=December 2009}}
An '''address verification system''' ('''AVS''') is a method used by credit card processors to enable merchants to [[Credit card hijacking|authenticate ownership of a credit card]] used by a customer.<ref name=":0" /> The system checks the billing address of the customer against the address on file at the credit card company. AVS is used in to other security features for the credit card, such as the [[Card Security Code|CVV2]] number. AVS is not available by all credit card providers, and not in all countries. It is generally not available for foreign credit cards, that is, cards issued in a country other than where it is being used.
In countries where AVS is available, a merchant in a non-face-to-face transaction can verify a customer’s ''bona fides'' by confirming their billing or delivery address against data in the credit card provider’s records.<ref name=":0">{{cite web|title=Address Verification System (AVS) |url=http://virtualtrak.blogspot.com/2007/03/address-verification-system-avs.html |publisher=VirtualTrak technologies|accessdate=September 7, 2011}}</ref> AVS verifies that the billing address of the credit or [[debit card]] matches the address that was given by the customer. However, AVS only verifies the numeric portion of the address, resulting in certain anomalies like apartment numbers, which can cause false declines. However, this is reported to be a rare occurrence.{{cn|date=September 2020}}
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