What if I receive fake money?

Everything must have evidence. As long as there is evidence, such as seeing it with your own eyes or recording evidence, it is easy to receive fake money.

If not, it's just my bad luck, but I think the handling method should be 1: self-destruction 2: giving it to the bank. Anyway, just don't spend any more.

Isn't the slogan "Check face to face, and you will not be responsible for leaving the cabinet" posted on all banks now? It can be seen that it is very difficult to obtain evidence afterwards if it is impossible to distinguish at that time.

I suggest you know more about coins and master skills, so that you can at least suffer less. In addition, you need to buy a money detector.