For Visa / MasterCard:
The three-digit value is printed on the signature panel on the back of Visa/MasterCard cards immediately following the Visa/MasterCard card account number.
| Security Strip Number |
| The Credit Card Identification Number is a new authentication system established by credit card companies to reduce fraudulent Internet transactions. It consists of requiring a card holder to enter a 3 or 4 digit number in at transaction time to help verify that the card is on hand. For Visa / MasterCard: The three-digit value is printed on the signature panel on the back of Visa/MasterCard cards immediately following the Visa/MasterCard card account number.
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