The signature on the back of the visa card needs to be written by yourself and cannot be altered. In domestic consumption, most merchants use passwords to verify the legitimacy of cardholders' consumption, and most people do not sign credit cards when they get them.

But when spending abroad, not signing will affect the use of credit cards. Many foreign merchants do not rely on password verification, but rely on personal signatures to confirm whether consumers are credit card owners.

When the cardholder accidentally handles business on the ATM and the card is swallowed, the bank staff will also compare it with the signature on the register and the personal signature on the north side of the credit card. Use this as a voucher to handle the card replacement business.