I am the regional manager of a liquor brand, and it often happens that the salesman falsely reports the entrance fee and is greedy for the company's property. Is there any good way to avoid it?

It's hard to check. It depends on the individual. If you are conscious, you want to have extra money. Or stipulate how much money to give you this time, and pay for the extra money yourself. Either you help him yourself, or you find an assistant to handle the big expenses together, or you call for advice. Can also be a stranger to ask, ask when you can tell the salesman what they are. How can you quote so much? Maybe every time you ask him to reimburse the expenses, plus the contact information of the person who reimbursed him at that time, he will take care of it. Maybe he will check the truth with him.