simply solve this problem as follows:

1. Return the bill

2. Apologize, and then return the bill

3. Get the consent of the seated person before taking the seat

4. Don't return the bill, let him make trouble

5. After negotiation

: You may find this solution meaningless. In fact, if you have experienced many times of customer seeking trouble, you will find that many problems will return to the initial stage. In other words: the customer is actually unreasonable, and he can't understand that you are a small shop with a small profit.

Because the matter of table-splitting usually happens in a relatively small store or a fast food restaurant, which is just an ordinary store, and interests are paramount, so the best solution is to ignore this customer and collect money as usual. You may be worried about the loss of this customer, but in fact, you can rest assured that he can't influence others.