There are two security measures behind credit cards. The first is a three-digit CVV password, and the second is a handwritten signature. Generally speaking, using credit card to pay online requires filling in CVV code; Online channels use credit cards for consumption, and merchants often need you to sign behind the credit card;

The reason for signing is also for security reasons; Because online shopping under the channel also needs to sign the details of the statement, the formal process is that the salesperson will compare the signature on the credit card with the signature on the bill. If the handwriting is obviously different, it may mean that this credit card is not your own credit card;

However, in China, many credit card users add a spending password to their credit cards, and most salespeople don't really compare the signatures on credit cards and bills, so it's not very useful to sign on them, but you still need to take this form. Not going? Then some businesses will refuse to use your credit card;

In addition, credit card signature is sometimes a prerequisite for reaching an agreement with the bank; If your credit card is stolen, sometimes the bank may be responsible, but if your credit card does not have your signature, your experience may be excluded from the bank's insurance policy, resulting in you not being able to enjoy compensation.