Legal analysis: 1, the invoice stamp is not clear, you can make up a clear chapter next to the invoice or directly to the invoice red void, re-open a new invoice. 2, the invoice should be stamped invoice seal, stamped with the financial chapter or the official seal of the can not be. 3, invoices can not be both stamped with the financial chapter and stamped invoice seal. 4, if the invoice seal stamped in reverse or stamped askew, the invoice as long as the Clear is valid. 5, the invoice should be stamped with the new version of the invoice seal, can not be stamped with the old version of the invoice seal, and can not be stamped with the new version and the old version of the invoice seal of the two chapters. 6, the "People's Republic of China *** and the State Invoice Management Measures" do not stamp the invoice seal of the invoice with clear penalties, in addition to ordering corrective action and the confiscation of the illegal income and impose a 10,000 a fine.

Legal basis: "the Chinese people's *** and the State invoice management measures"

Article 2 in the national invoice of a unified style, determined by the State Administration of Taxation. The invoices in the provinces, autonomous regions and municipalities directly under the Central Government within the scope of the unified style, by the provinces, autonomous regions and municipalities directly under the Central Government of the State Taxation Bureau, local tax bureaus (hereinafter referred to as the provincial tax authorities) to determine.

Article 3: The basic invoices include the stub, the invoice, and the accounting unit. The stub copy by the payee or the invoicing party to keep for inspection the invoice copy by the payer or the payee as the payment of the original documents, the account copy by the payee or the invoicing party as the bookkeeping original documents. Provincial and above tax authorities may, according to the invoice management and taxpayers' business needs, increase or decrease the number of copies other than the invoice copy, and determine its use.