There is a kind of invoice, called invoice, which is the proof of a transaction.

The seller issues an invoice to the buyer, which lists the details of the transaction, such as the name, quantity and price of the goods. After receiving the invoice, the buyer shall pay according to the above amount and account number. Take the initiative to declare income when paying taxes. Domestic "invoice" is a means of tax control, and a company can't escape tax when issuing invoices. Invoices can be issued regardless of whether the actual payment has been paid. In some cases, the first party requires an invoice.

Unlike domestic invoices, overseas invoices need formal tax supervision. Sometimes it's like a shopping receipt, and sometimes it's just a receipt. After you get the overseas invoice, please ask the relevant leaders of the unit to sign it, and you can reimburse it like a regular domestic invoice.