Legal analysis: The second-hand house sales contract is an agreement between the buyer and seller on the purchase of a certain house. It has nothing to do with the intermediary and does not require the intermediary's signature. An intermediary second-hand house sales contract refers to a second-hand house sales contract in which the subject includes not only the buyer and seller, but also the intermediary acting as an intermediary. The intermediary second-hand house sales contract is different from the individual second-hand house sales contract, not only in the subject of the contract, but also in the content of the contract and the assumption of responsibilities. In short, in the second-hand house sales market, the intermediary second-hand house sales contract clarifies the rights and obligations of the contract subjects and plays a certain regulatory role for the three parties.

Legal basis: Article 962 of the "People's Republic of China and Civil Code" The intermediary shall truthfully report to the client matters related to the conclusion of the contract. If an intermediary deliberately conceals important facts related to the conclusion of a contract or provides false information and damages the interests of the client, it shall not request payment of remuneration and shall bear compensation liability.

Article 58 of the Urban Real Estate Management Law of the People's Republic of China and the State Council shall meet the following conditions: (1) Have its own name and organizational structure; (2) Have a fixed (3) Have necessary property and funds; (4) Have a sufficient number of professionals; (5) Other conditions stipulated by laws and administrative regulations. To establish a real estate intermediary service agency, one must apply for establishment registration with the industrial and commercial administration department and obtain a business license before starting business.