What is the CVC Security Code?

Your credit card has a unique security code, which helps ensure your card is present during a transaction. Visa and Master Card credit cards feature a three-digit number on the back of the card, immediately following the account number. American Express cards feature a 4-digit number on the front of the card, above the account number. We request that you enter this number as an added security measure.
3 or 4-digit security code