It is legally effective that the official seal does not press the word. But if the official seal is written later, there will be a difference. As for whether it is effective or not, it depends on whether the other party approves it. If the contract requires both parties to express their agreement, then sign or seal it for confirmation, and then seal it before there is any written content, it cannot be considered that the agreement is expressed. Of course, if the other party recognizes it, it is also considered effective.

Is it valid for a legal person not to sign an official seal?

Whether it is valid for a legal person not to sign the official seal depends on the situation:

1. It depends on whether there is an agreement in the contract. If there is an agreement, it must be signed before it can take effect. Without signature, it is invalid;

2, there is no clear agreement, according to the specific circumstances of the case, in principle, invalid;

3. Where an economic contract or a labor contract is involved, a contract that is only stamped with the official seal or the special seal for the contract and not signed by the legal representative or the agent entrusted by the legal representative is invalid;

4, similar to the factory rules and regulations, labor discipline, etc. Just stamp the official seal.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC).

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.

Article 49 1

The parties conclude a contract by means of letters, data messages, etc. It is also required to sign a confirmation letter, and the contract is established when the confirmation letter is signed.

If the information of a commodity or service released by one party through information networks such as the Internet meets the conditions of the offer, the contract is established when the other party successfully selects the commodity or service and submits the order, unless otherwise agreed by the parties.