1, the official seal must be filed with the public security organ, which has a unified number, but many people say that the number on the official seal is the business license number, but I see that 99% of the official seal is not the business license number, and some organizations have no business license at all.

2. The special invoice seal, generally speaking, is the tax registration number, which is the shape and size of the seal designated by the national tax.

3. Special financial seal, with public security organ number or no official seal number.

4. The seal of the legal representative and the seal in regular characters, some with the unified number of the public security organ, some with the personal ID number, and some with the private seal without the number, are all three kinds of corporate seals.

5. The signature seal is generally the seal used by the legal representative. The difference from ordinary carving is that it is carved with my signature handwriting, which may or may not be numbered.