this is really difficult to deal with.

There were two lawyers who spent money in a regular large restaurant, but they couldn't give the invoice at that time. They agreed with the restaurant to pick up the invoice later, but the restaurant was responsible for the cost of picking up the invoice, because the restaurant couldn't provide the invoice on time and signed the agreement on the spot. Half a month later, the two lawyers came to the restaurant again from another city. The restaurant provided the invoice first, the two lawyers showed the tickets (higher than the invoice amount) from another city, and the restaurant paid the fare as promised.

therefore, since you are cooking, try to follow the rules to avoid unnecessary losses.