1. When the credit card is lost, immediately call the 24-hour customer service hotline of the issuing bank to provide basic information, and ask the staff to report the loss of the credit card as soon as possible and apply for a new card.

2. Bring your ID card to the credit card department of the bank to report the loss. You'd better do it yourself. The procedure will be simpler. If you need someone else to do it for you, you need to write a power of attorney and seal it.