The three digits behind the bank card, the specific location is shown in the figure below:

The three digits behind the bank card are the credit card security code, which is used when the credit card is used for online or telephone transactions. a security code.

It is usually a 3 or 4-digit number printed on the credit card, and the printing location will be different for different types of cards. It is often used to prevent credit card fraud by verifying that the payer owned the credit card at the time of the transaction.

Extended information

When using a credit card, you should pay attention to the following aspects to prevent credit card theft:

First of all, convert the magnetic stripe card application to a chip card as soon as possible , such as the all-currency international chip card, Liaotong card and other products vigorously promoted by the Bank of China, all adopt advanced chip card technology and have the characteristics of large storage capacity, high security and high reliability, which can greatly reduce the risk of credit card theft. .

Secondly, try to choose password and signature verification methods. When swiping a card for transactions, it is recommended that the card should not be out of sight when swiping the card for consumption. When receiving the purchase form and card returned by the cashier, please be sure to carefully check whether the amount on the purchase form is correct and whether the card is indeed your own card.

Finally, protect your personal card information: the last three digits in the signature column on the back of the credit card are the credit card security code, which is an important identification of the credit card for online payment and telephone payment. Remember not to disclose this verification to anyone. In addition, banks provide SMS verification code services for some online payment services. When receiving a call, as long as the other party asks for a verification code or security code, it must be a scam.

Baidu Encyclopedia-Credit Card Security Code

Bank of China—Secure two key links to ensure card security Xinhuanet