CCV2 code, also known as credit card security code, is the security code for credit card transactions. It is usually printed on the signature on the back of a credit card. It is the last three italics, which proves that the payer has a credit card when trading.

CVV2 is used as a security code for credit card transactions on the Internet or telephone. It is almost as important as a password, even more important than a password. CVV2 is usually used to verify whether the payer has a credit card at the time of transaction.

How to check the credit card security code?

The holder can check the security code by himself or in kind. There are seven (and eight) bold characters on the back of the credit card. The first four characters end with the bank card number, and the last three digits are security codes. It's best to write down the security code in a private notebook, so that the security code will not be clearly displayed in the future, and the latter will be forgotten. Take it out and check it again.