Please turn your card over and enter the last three digits on the reverse of your card on the signature strip
The credit card Security Code, also called the Bank code or the Card Identification Number (CIN), is a special security code feature on Switch, Maestro, MasterCard and Visa credit cards. By requiring the Security Code to be entered with your other credit card details, you are verifying that the order is being placed by the card holder. The Card Identification Number (CID) is not raised, so they are not scanned into standard credit card readers. In theory, these numbers are only visible to the card holder.
Flip your card over and look at the signature box. You should see a 16-digit credit card number followed by a special 3-digit code. This 3-digit code is the credit card Security Code.