But at best, the invoice as a subsidiary document, play the role of supplementary instructions, no legal effect. So it is better to issue an invoice.

The catering industry has to pay 7% tax to the tax department after issuing the invoice. When a guest spends 500 yuan, the restaurant has to pay a tax of 35 yuan. To the monthly turnover of about 200,000 yuan of small restaurants, for example, if the formal channels, almost 15,000 yuan per month just to pay the tax. If you do not invoice or less invoicing, you can save at least tens of thousands of dollars per month. Bigger hotels save more money.