The customer hasn't paid yet. You can give him a receipt.

1. Customers' demands are overbearing, but sometimes there is nothing they can do. Their approach should be to avoid risks, and the possibility of fraud is relatively small;

2. If you haven't received the payment, it is of course risky to issue a receipt, mainly because in case of legal disputes, customers can use it as the basis for payment;

3. If the customer is tough, then you have no choice;

4. It is suggested to fill in the remarks column of the receipt: this receipt is only used as the basis for your request, so please pay in time.