Yes, invoices refer to business vouchers issued and collected by all units and individuals in the purchase and sale of goods, provision or acceptance of services and other business activities. They are the original basis for accounting and an important basis for law enforcement inspection by audit institutions and tax authorities. The receipt is the proof of receipt and payment, and the invoice can only prove that the business has happened, but can't prove whether the money has been received or paid.

Measures for the Administration of Invoices of the People's Republic of China

Article 19 Units and individuals that sell goods, provide services and engage in other business activities shall collect money from foreign businesses, and the payee shall issue invoices to the payer; Under special circumstances, the payer will issue an invoice to the payee.

article 21 all units and individuals engaged in production and business activities shall obtain invoices from the payee when purchasing goods, receiving services and paying for other business activities. When obtaining an invoice, it is not allowed to change the name and amount.

article 14 accounting vouchers include original vouchers and accounting vouchers. To handle the economic and business matters listed in Article 11 of this Law, original vouchers must be filled in or obtained and submitted to accounting institutions in time. Accounting institutions and accountants must examine the original vouchers in accordance with the provisions of the unified national accounting system, and have the right to reject the untrue and illegal original vouchers and report to the person in charge of the unit; The original vouchers with inaccurate and incomplete records shall be returned and required to be corrected and supplemented in accordance with the provisions of the unified national accounting system. All the contents recorded in the original documents shall not be altered; If there is an error in the original voucher, it shall be reopened or corrected by the issuing unit, and the correction place shall be stamped with the seal of the issuing unit. If there is an error in the amount of the original voucher, it shall be reopened by the issuing unit and shall not be corrected on the original voucher. Accounting vouchers shall be prepared according to the audited original vouchers and relevant materials.