For your safety and security, we require that you enter your card's verification number. The verification number is a 3-digit number printed on the back of your card. It appears after and to the right of your card number.
If you are using American Express, the number is a 4-digit number printed on the front of your card. It appears after and to the right of your card number.
Note: The digits are printed on your card, rather then stamped in the plastic like the digits in your credit card number.