The Card Verification Value (CVV) number is a unique code printed on your physical credit card used for card verification purposes. For most credit cards, this is a three-digit number printed on the ...

Credit card authentication is a way of verifying that a person attempting a credit card transaction is who they say they are and that they are authorized to use that card.

When you make credit card purchases online or over the phone, you'll often need the card's security code to complete the transaction. The security code helps to protect you from credit card fraud and ...