Q: I found that there was an error in the credit card statement last month, and there was a consumption account I didn't know. What should I do? A: When there is an error in the statement or there are more consumer accounts that you don't recognize, you should immediately notify the card-issuing bank by phone or in writing, indicating your name, account number, error type, date, amount and data evidence. The issuing bank will investigate, correct any mistakes, and explain the reasons to you if there are no mistakes. You don't have to pay the disputed money during the investigation. If the card is lost and fraudulently used, as long as you complete the reporting procedures within the time specified by the issuing bank, the credit card risks arising from transactions other than your own after the reporting takes effect will be borne by the issuing bank. If you forget this fee and ask the issuing bank to read and sign the bill, some issuing banks may ask you to pay the fee for reading and signing the bill, with different fees. So you'd better recall whether you forgot this fee, and then find the issuing bank to investigate. So after each consumption, you should at least keep the signed bill until next month's statement, and then destroy it after checking it.