Strict Address Verification Service (AVS)

One of the most widely used fraud prevention tools in card-not-present transactions is the Address Verification Service, or AVS

An AVS check compares the billing address used in the transaction with the issuing bank’s address information on file for that cardholder. Specifically, AVS checks whether or not the numeric address and zip code entered in the order match with the address kept on record at the issuing bank. 

You can enable or disable this by navigating to your Settings Tab- Site Settings- Options- Strict AVS

If this option is disabled, Enrollware still requires the address and billing zip code to match. If they do not match, it will not allow the transaction to process.