The ICBC credit card security code is found on the back of the card, below the signature line. A credit card security code is a security code for credit card transactions over the Internet or over the phone, which prevents credit card fraud. Leaking a credit card security code is equivalent to revealing a password. The fraudster does not need to steal the card. He only needs to know the card number and security code to steal the credit card thousands of miles away. Therefore, cardholders must avoid leaking security codes.

For ICBC credit cards, the last 3 digits are below the signature line on the back of the card. The security code is usually a 3 or 4-digit number printed on the credit card, and the location of the printing may vary depending on the card type. It is often used to prevent credit card fraud by verifying that the payer owned the credit card at the time of the transaction.