Where is the CVV Number?
For Visa & MasterCard cards, the three digit number is in the signature area of the back of the card. It is the last 3 digits in this area.
For American Express cards, the four digit number is on the front above the card number.
What is a CVV Number?
A card verification number is used to prevent fraud. It ensures that you, the cardholder, actually have the card in your hand. If someone else were to get their hands on your card number, they would not have your CVN.