Address verification service
An address verification service (AVS) is a service provided by major credit card processors to enable merchants to authenticate ownership of a credit or debit card used by a customer. AVS is done as part of the merchant's request for authorization in a non-face-to-face credit card transaction. The credit card company or issuing bank automatically checks the billing address provided by the customer to the merchant against the billing address in its records, and reports back to the merchant who has the ultimate responsibility to determine whether or not to go ahead with a transaction. AVS can be used in addition to other security features of a credit card, such as the CVV2 number. Some countries, such as Denmark, do not permit banks to verify customer data.