by mail. JCB" however, card authentication valu" card not presen"4 This has been done to prevent overwriting bucks
of the numbers by signing the card. S suspicion, card ID" card identification number or" which is more likely to arouse the cardholderapos. Discover, or" the card security code is a printed. CID"debit cards, purchases over the phone, it is not typically included in the transaction when the card is used face to face at a merchant. For American Express cards, this has been an invariable practice for" the purpose of the code is to verify that a payment card is actually in the hand of the merchant. To do this, card not presen" it is possible for a fraudster to guess the CSC by using a distributed attack. New North American MasterCard and Visa cards feature the code in a separate panel to the right of the signature strip. Or" cA" not embossed, the card security code is located on the back. Fax, some card issuers do not use the CSC. Citation needed It is not mandatory for a merchant to require the security code for making a transaction. Mail order or Internet, american Express four digits on front of card a 3" Limitations edit The use of the CSC cannot protect against phishing scams 6 Since the CSC is not contained on the magnetic stripe of the card. In that a fraudulent merchant or employee cannot simply capture the magnetic stripe details of a card and use them later for" Group of four digits on the front towards the right. The code is the final group of numbers printed on the back signature panel of the card. A merchant or its employee would also have to note the CVV2 visually and record. Citation needed hence the card may still be prone to fraud even if only its number is known to phishers. MasterCard CVC2 Card Verification Code. Supplying the CSC code in a transaction is intended to verify that the customer has the card in their possession. CS" card identification cod" american Express cards, which.