If the official seal has an anti-counterfeiting mark, when the official seal is carved at the official seal engraving office designated by the industrial and commercial administration department, the seal engraving office will put an anti-counterfeiting mark on the official seal of each unit, and each official seal will have an anti-counterfeiting mark. The anti-counterfeiting marks are all unique and different. In order to facilitate management, the size of the official seal is a unified size prescribed by the industrial and commercial administration department.

The special stamps are all circular, with a blank center, a diameter of 4.0cm, and a circle edge width of 0.1cm. The upper arc is the name of the unit, circulating from left to right, and the content of the special stamp is placed on the chapter. The lower part is arranged horizontally, and the printed text uses simplified Song script. The seal specifications of other enterprise departments and individual and private enterprises are circular, with a diameter of 3.8cm and a width of 0.1cm. A five-pointed star is printed in the center. The name of the enterprise approved on the business license is printed on the seal, circularly from left to right. The printed font will always be Simplified Song. The special seal for industrial and commercial enterprise contracts, regardless of the economic sector, is always round, with a diameter of 5.8cm and a round edge width of 0.15cm. The name of the company is printed on it, circularly from left to right. There is no five-pointed star in the center. The bank where the company opens an account and the bank account number are printed. , phone number and business address, arranged horizontally from top to bottom. If multiple contract-specific seals are engraved, numbers should be engraved at the bottom of the seals, and simplified Song fonts should be used for the seals.

The seals of limited liability companies are always round with a diameter of 4.0cm, and the diameter of special seals and company department seals is 3.8cm. The seals of joint-stock companies are always circular with a diameter of 4.2cm and a round edge width of 0.12cm. The diameter of special seals and company department seals is 4.0cm. The width of the round edge is: 0.1cm. The five-pointed star in the central publication and the company name in the five-pointed star external publication are circular from left to right, or the front part of the name is circular from left to right, and the back part is horizontally arranged from left to right. The seal uses simplified Song fonts.

Legal basis

"Regulations of the State Council on the Management of Seals of State Administrative Agencies and Enterprises and Public Institutions and Social Groups"

Seals of local people's governments that implement regional ethnic autonomy , can publish both Chinese characters and corresponding ethnic characters. The Chinese characters printed on the seal should use the simplified characters announced by the State Council, and the font should be Song style.

Article 490 of the Civil Code

If the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign, seal or fingerprint the contract. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it.