CVV Information
The Card Verification Number (CVN) is a 3 or 4 digit number printed on your credit card. It provides extra security when you use your card on the Internet or over the phone. The number appears only on the card itself, not on any receipts or statements.MasterCard and Visa: MasterCard and Visa puts the CVN on the back of the card, in the signature box. The signature box will either have the entire 16 digit credit card number or just the last 4 digits, followed by a 3-digit number. This 3-digit number is the Card Verification Number.

American Express: American Express puts the 4-digit CVN on the front of the card, above the account number. Sometimes it's on the right side of the card and sometimes it's on the left hand side of the card, but it is always 4-digits, and above the account number.