发票是商品交易、提供劳务和从事其他经济活动的书面证明,是企业财务收支的法定凭证,也是财政、税收、审计等部门进行财务税收检查的重要依据。同时,发票也是保护消费者权益的法定依据。正确使用发票包括:发票的印制、发票的领购、发票的开具和保管等三个方面。 Invoices are written certificates of commodity transactions, provision of labor services and other economic activities. They are the legal vouchers for the financial revenues and expenditures of enterprises and are also the important basis for the financial and taxation examination conducted by the departments of finance, taxation and auditing. At the same time, invoices are also the legal basis for protecting the rights and interests of consumers. The correct use of invoices include: invoice printing, invoice acquisition, invoicing and custody of three aspects.