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The purpose of the code is to verify that a payment card is actually in the hand of the merchant (thus it should be different from CVV2). This code is automatically retrieved when the magnetic stripe of a card is read (swiped) on a point-of-sale (card present) device and is verified by the issuer. A limitation is that if the entire card has ...
csc/cvc/cvv/cvv2 A card security code (CSC) (also termed card verification code (CVC) and card verification value (CVV/CVV2)) is also associated with the virtual credit card; as in standard credit cards, a CVV is used in virtual credit cards to establish card ownership by the buyer and to authorize transactions.
I understand that CVV2 is designed to verify that the person making "card not present" transactions occurring over the Internet, by mail, fax or over the phone is holding the physical card at the time of transaction. However, CVV2 code is just a 3-4 digit number. Unlike a PIN code or password, the CVV2 code can never be changed.
Following a request from a merchant for an address verification, the credit card processor sends an AVS response code back to the merchant indicating the degree of address matching. The meaning of the codes vary between credit card processors. Merchants can use the AVS code to determine whether to accept or reject a credit card transaction.
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The card security code (in this case, CVV2) system has been set up to reduce the incidence of credit card fraud arising from CNP. [3] Mail-order fraud
For a payment application to be deemed PA-DSS compliant, software vendors must ensure that their software includes the following fourteen protections: [3]. Do not retain full track data, card verification code or value (CAV2, CID, CVC2, CVV2), or PIN block data.