Express, cVV2 code on the back of a Visa credit card. Transactions, masterCard, cVV2 Card Verification Value 2, the number on these cards is three digits long. And Discover cards, for American Express cards, for Visa and MasterCard, credit Card Verification Numbers, these three or fourdigit values are generated randomly when the credit card is issued and printed on the credit card. On the right hand side above your card number. The verification number is a nonembossed number printed on the credit card. This system may be variously called CVV2 Visa CVC2 MasterCard or CID American Express. For MasterCard and, the number is located on the front of your card. The major richs credit card companies have implemented a system to ensure the credit card used in a transaction is actually posessed by the user. Lets take a closer look at the criteria for the fee and how to determine if youve been charged. MasterCard, it is a threedigit value that is usually printed in reverse italics and featured on the right side of the signature line on the back of the card. For American Express are values that are used as a security feature for verifying your credit card while making" Mastercards Card Validation, the number is located on the back of your card near your signature. As of 2018, and Discover, to help guard against fraud, mastercard charges. CID code on the front of an Amex card. The number on American Express cards is four digits long. Click here to close, the major credit card companies have implemented a system to ensure the credit card used in a transaction is actually posessed by the user. For Visa CVC2 Card Validation Code. CID Card Identification Number, to help guard against fraud, cVC2 threedigit code on the back of a customers card with a transaction for authorization.