What is a Card Security Value (CSV)?

This is a unique number given to all credit card holders and is only present on the physical card. The CSV number is a three digit (Visa and MasterCard) or four digit (Amex) value which provides our payment processor with a check of the card's authenticity. These codes validate that you have the credit card in your possession and that the card account is legitimate.

Where can I find the numbers you are asking me to enter?

The Card Security Value (CSV) is a three digit value at the back of your Visa and Mastercard cards or a four digit value on the front of your American Express card.