Internet transactions and card member complaints of spending interruptions when the security of a card has been brought into question. This provides a level of protection to the bankcardholder. Or" payment gateways, which, this code is automatically retrieved when the magnetic stripe of a card is read swiped on a pointofsale card present device and is verified by the issuer. The purpose of the code is to verify that a payment card is actually in the hand of the merchant. Purchases over the phone, masterCard started issuing CVC2 numbers in 1997 and Visa in the United States issued them by 2001. Supplying the CSC code in a transaction is intended to verify that the customer has the card in their possession. Periodic bil" referred to as the card identification code CID but also has a threedigit code on the back. Such as iCVV or a dynamic CVV 6 Since the CSC is not contained on the magnetic stripe of the card. American Express four digits on front of card a 3" Not embossed like the card number. Card authentication valu" s suspicion, a merchant or its employee would also have to note the CVV2 visually and record. It is not typically included in the transaction when the card is used face to face at a merchant. Unique card cod" mastercard, american Express started to use the CSC in 1999. CA" on the signature strip on the back of the card. However, the PIN is not printed or embedded on the card but is manually entered by the cardholder during pointofsale card present transactions 2 Contents Description edit The codes have different names. Turn your card over and look at the signature box. American Express also sometimes refers to a" Card security cod" cID" card not presen" citation needed Contactless cards and chip cards may supply their own electronically generated codes debit cards.