Generally, there are 13 digits, and the first four digits are the area code, which generally corresponds to the first four digits of the business license. The fifth, sixth and seventh digits are the company numbers with official seal engraving qualification, and the number of each company is different. The last six digits are the serial number of the company that engraved the official seal. The fake code of the official seal can't really play the role of anti-counterfeiting. The code can only be queried in the Public Security Section of the local public security bureau, but most people can't find it.

Every company has a different serial number. The last six digits are the serial number of the company that engraved the official seal. For example, if this company engraves the financial seal and official seal of the same company, the last six digits of this official seal are 01111,and the financial seal is 0 165438+. The financial seal number is followed by the official seal number. If he takes another business, it will be 011113. Only two companies with different seals have the same first five codes, different company codes and different serial numbers, but they are all arranged in a regular and orderly manner. The code and company information can be found in the Public Security Section of the local public security bureau.