An Account Verification authorization verifies a customer's account information. You can use it to validate account numbers and other authentication elements such as CVV2 and AVS.
It differs from a normal Authorization in the following ways:
The transaction value is always 0. It does not place a hold on the cardholder's open-to-buy limit.
Although the RESULT value returned is 0 (Approved), the RESPMSG value is Verified, instead of Approved.
The TRANSSTATE is set to 0 to prevent this type of transaction from being captured.