What is CVV2 / CVC2?

CVV2 / CVC2 is a security measure required for all transactions. A CVV2 / CVC2 number is printed on your credit card, and therefore the only way to know the correct CVV2 / CVC2 number for your credit card is to physically have possession of the card itself.
On a Visa or MasterCard, the CVV2 / CVC2 number is printed next to the signature panel (see as below picture). You will find a 3-digit number. That 3-digit number is your CVV2 / CVC2 number!