The card security code (csc) is a unique three or four digit, non embossed security number, associated to your credit card number, as illustrated below. It can also be called a “card verification code” – CVC
The three-digit card verification code (CVV or CVC2) is non embossed and typically printed on the signature panel of your card, immediately after the card’s standard number, as show in this example. In some cases you may see the last 4 digits of your card number with the additional 3 digit security code following.