Legal analysis: Generally speaking, the house purchase contract is usually stamped with the official seal of the real estate development company, the name stamp of the legal representative or the signature. Whether it is a natural person or a legal person, just sign or seal, and choose one of them. However, according to the general practice and trading habits, not only the seal of the legal entity is usually required, but also the signature of the legal representative. Because only when the seal and signature are complete can the reliability of the contract be ensured.

legal basis: article 49 of the civil code of the people's Republic of China. if the parties conclude a contract in the form of a contract, the contract shall be formed when all the parties sign, seal or fingerprint it. 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 writing as stipulated by laws and administrative regulations or agreed by the parties. if the parties fail to do so in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.