Legal analysis: it is formal. Hand-torn invoice is a kind of invoice printed by the tax department in advance, which will be issued by the service personnel after the customer purchases.

Legal basis: Article 3 of the Measures for the Administration of Invoices in People's Republic of China (PRC) The term "invoice" as mentioned in these Measures refers to receipts issued and collected in the process of buying and selling commodities, providing or receiving services and engaging in other business activities.