The position is three digits behind the signature column on the back of the bank card.

The security code refers to the CVV2 code of the credit card, which is the security code when the credit card trades through the network or telephone. Generally, it is a 3-digit or 4-digit number printed on the back of a credit card, and the printing position of different types of cards may be different. It is generally used to confirm the payer's possession of the credit card during the transaction to prevent credit card fraud.

Cardholders should keep their security codes confidential. If they provide the security code and card number to others, it may cause unnecessary property losses.