Credit Card Security Code

What is the Credit Card Security Code?

For credit card payments, you may be required to enter the Security Code from your credit card. For Visa, MasterCard and Discover, the Security Code is a three-digit number printed on the back of the card to the right of the card number in the signature line. For American Express cards, the Security Code is a four-digit number printed on the front of the card on the right hand side.