Legal analysis: Special invoices must be stamped with the company's "special invoice seal". The special invoice seal cannot be replaced by the special financial seal and the official seal, and only the latest version of the special invoice seal can be stamped. There are also corresponding requirements for the quality of stamping, for example, the stamping requirements should be clear and identifiable, and should be completely stamped on the invoice, not only half.

Legal basis: Article 28 of the Detailed Rules for the Implementation of the Measures for the Administration of Invoices in People's Republic of China (PRC) stipulates that when issuing invoices, units and individuals must fill in the invoices in numerical order, and the items filled in are complete, so as to ensure that the contents are true and legible, and all of them are printed at one time, and the contents are completely consistent, and the invoice seal is affixed to the invoice joint and the deduction joint.