On the one hand, setting passwords for credit cards is a trap set by domestic banks, and on the other hand, it is related to the inherent usage habit that everyone needs to set passwords for savings cards. If a credit card with a password is stolen, the responsibility lies with the user. Because the basis of credit card consumption with password is password, if the user does not save the password well, the bank will not be responsible for being stolen. Sometimes some banks will encourage users to set passwords. In fact, this is a trap set by domestic banks, and they are shirking their responsibilities. Credit card transactions without passwords are based on signatures. When swiping your credit card, the merchant needs to compare whether your signature on the consumption receipt is consistent with the signature on the back of the card. If it is inconsistent, the cardholder can appeal, claim that the consumption is invalid, and recover the stolen amount, and the loss will be borne by the merchant (who told them not to compare the signature? ）。 If you lose your credit card, generally speaking, others can't imitate the same signature. Even if it is stolen, you can claim it back from the bank. For example, China Merchants Bank I use has a daily recovery limit of 15,, while my credit card has a fixed limit of only 14,. Even if my credit card is lost and stolen, I can recover it. If you often use Paypal or spend money on foreign websites (for example, you need to enter the password of Apple ID when downloading paid applications in the App Store, but you are never required to enter the password of your bank account), you will know that even if you set the password, you can spend money with foreign credit cards without entering the password at all. However, you must protect the three-digit verification code on the back of the credit card and never reveal it to others (of course, the card number and expiration date should also be protected). Otherwise it is easy to be stolen. According to the data of the Financial Times two years ago, only 15% of people know that it is safer not to set a password. It is estimated that this proportion will not be much higher now, and people who pay by password can be met everywhere in their lives. -I haven't recovered this either, but it is estimated that it will be more troublesome and I have no trust in domestic banks. Therefore, it is still necessary to protect your card number, expiration date and verification code. But with signature trading, you have a chance to get your money back, while with password trading, you don't even have this chance. It's safer to sign.