First, the difference between square chapter and round chapter
1, with different purposes: the circular seal belongs to the official unified seal of the state and units, while the square seal is generally used internally, with low effectiveness.
2. Different grades: the circular seal has a higher grade and is used for high-level stamping, while the square seal has a lower grade and is used for low-level stamping.
3. Different shapes: the shape of the round chapter is mainly oval and round, and the shape of the square chapter is mainly rectangular.
Therefore, generally speaking, there is no difference between the square seal and the round seal. Square seals (including squares and rectangles) are mostly used by private seals. The official seal is the most effective of all seals and a symbol of legal person's rights. In the current legislative and judicial practice, it is an important criterion to judge whether a civil activity is established and effective.
Legal basis:
People's Republic of China (PRC) Civil Code
Article 465
Contracts established according to law are protected by law. A legally established contract is legally binding only on the parties, except as otherwise provided by law.
Article 490 Time of Establishment of a Contract
If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.
A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.