Invoicing refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities. It is the original basis of 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.

Extended data:

Invoice in economic activities, the text issued by the seller to the buyer, including the name, quality and agreed price of the products or services provided to the buyer. In addition to the advance payment, the invoice must include the payment from the buyer to the seller according to the agreed conditions, and must include the date and quantity, which is an important proof of accounting. China's accounting system stipulates that valid invoices for purchasing products or services are called tax invoices.

Invoice is the original proof of the cost, expense or income incurred, which is mainly the basis for the company to make accounts and is also the proof of tax payment; For employees, invoices are mainly used for reimbursement.