To use a credit card, you need to add a security device to it. The "signature+password" consumption verification method is this kind of security device, and it is also a way for banks to confirm the identity of cardholders when spending. At present, there are two ways of consumer authentication: signature and signature+password. The cardholder can choose any verification method, and its advantages and disadvantages are as follows:

1. Signature+password verification

The advantage of "signature+password" verification is that the security is higher than that of using signature alone, and the risk of credit card being lost and stolen is very small. The disadvantage is that once the credit card is stolen, the consumer will take full responsibility, and the bank that reported the loss will no longer be liable for compensation.

sign

The advantage of only using signature verification is that the merchant has the responsibility to verify the signature, and the bank also has to bear the compensation responsibility for the theft of the credit card, so once the credit card is stolen, the consumer can get compensation from the bank or the merchant, and at the same time, because the password is not needed, the consumer also saves the trouble of forgetting the password and not spending. The disadvantage is that due to the imperfect signature verification technology in China, once the credit card is lost, there is a great risk of being stolen.

This method used by your son is relatively common and safe in China. At the same time, I also suggest that you use this method in the future.