First of all, the bank doesn't know you, and it doesn't make any sense to imitate or not to imitate your signature. The cashier's duty is to check whether the signature on the back of the card is consistent with the signature of the purchase order when spending. Since there is no card, you can't sign on the back of the card, so there is no meaning of imitation.

Second, you are really responsible for your information leakage, but if you don't handle the card yourself, you only need to cooperate with the bank to report the case to the public security organ and provide all the clues you can provide, so that if the public security organ catches the suspect, the responsibility for repayment naturally belongs to the criminal suspect.

Third, if you are proved by banks and public security organs that you know that there may be a credit card being processed ... it will be more troublesome. Maybe you should actively cooperate with public security organs and banks to catch suspects, otherwise, ...

Good luck. In addition, please take good care of your personal data. When you provide a copy of your ID card, please mark the words "XX business only" on your ID card. This is relatively safe.