The problem is very serious. One of the three lists given to the bank is the copy kept by the bank. One for the people's bank. Another one is for foreign exchange control agencies, which seems safe. Failure to submit these bills proves that the source of foreign exchange is unknown. Must you give it to the bank? Many people who copy foreign exchange directly change it without giving orders or anything. That's good. If you have to give the list to the bank, there is nothing you can do. If you don't need it, then there is no problem. The key depends on whether your list has a number. Did the bank ask you for this numbered list?