As you may have noticed, we request the Card Security Code, CSC, number on your credit card during your Secure Checkout process, for your protection. The CSC number is an authentication scheme to help prevent fraud. Therefore, if your credit card number is provided with an incorrect CSC number, the transaction will not be approved.
If you have a Visa or Mastercard the CSC number is located on the back of your card and it is 3 digits. On an American Express card the CSC number is located on the front of the card and is 4 digits. The CSC number is often also referred to as a CVV (card verification value) or CVC (card verification code)