1. The verification code of ICBC Head Office refers to the 3 digits on the back of the card.

On the back of each card, two sets of numbers are usually displayed in italics at the top of the signature. The first four digits are the last four digits of the card number. The last three digits are commonly known as the last three yards.

3. It is a verification code set by commercial banks to ensure the security of credit card passwords, and it is used for indirect credit card consumption transactions for bank cards.

The verification code sent by ICBC is the short message number that customers must correctly enter when handling business in online banking, mobile banking or ICBC counter, and it is also an important basis for verifying the identity of customers.