CVN2 is the security check code of credit card, which is called card verification value 2. The signature column, usually located on the back of a credit card, consists of three digits. CVN2 can help merchants to confirm the cardholder's card information and avoid forgery and fraud. Therefore, for some websites or stores that need to pay fees, cardholders usually need to enter CVN2 on the back of the card in the payment interface to conduct transactions.

Using CVN2 code can improve the security of credit card payment, but it also needs special attention. For example, CVN2 code and card number should not be stored in the same location to avoid being stolen by malicious software or hackers. Moreover, cardholders need to carefully protect their CVN2 code when using credit cards, and do not disclose it to unreliable merchants or third-party platforms to prevent losses.

The existence of CVN2 code can provide more protection for credit card holders. However, the possible risks of using CVN2 code also need our attention. Therefore, when using credit cards, we should pay attention to safety precautions, actively understand the relevant knowledge of CVN2, and improve our awareness of online transaction safety.