What is ???

that is the 3 digit number at the back of your credit card, it is supposed to be an extra security measure but I don't see how because if someone already has your card, well they have number too! I guess it stops another kind of credit card fraud

Turn over the card (EXCEPT American Express cards == see at end)

Look in the 'box' where you sign.

In the top right-hand corner you will see some numbers.

The CVV number is the LAST (or ONLY) 3 digits - if there is more than one set of numbers, it's the group of 3 on their own.

For American Express - look at the front of the card.

On the far right hand side, just ABOVE the last digit of the card number (raised numbers) you will see a group of 4 digits in smaller text .. enter all 4 (or if only 3 are wanted, the last 3)

go to the bank website that issued the card there you can do a search and find where it is on the card. most are on the back but some (like American express) have it on the front

On your signature strip on your card there is a four figure number and a three figure number.

the cvv number is the three figure number on the signature strip.