Legal analysis: As long as there is a written authorization from the home buyer, the agent’s signature is valid. The purchase contract generally requires the signature of the purchaser, which is a citizen's right. The law stipulates that a contract shall become effective upon signature of both parties. If the home buyer is indeed unable to sign due to special circumstances, he may entrust another adult citizen in writing to act as his agent to sign and seal. If there is a written authorization from the home buyer, the agent's signature is valid.

Legal basis: "The People's Republic of China and the Civil Code"

Article 165 If the authorization for an agency is in written form, the power of attorney shall specify the agent name, agency matters, authority and term, and shall be signed or stamped by the principal.

Article 167 If the agent knows or should know that the agency matters are illegal but still performs agency acts, or the principal knows or should know that the agent's agency acts are illegal and does not object, the principal shall The person and the agent shall bear joint and several liability.