Legal analysis: 1, the failure to file a house purchase contract cannot simply be considered invalid or valid. It should be treated differently according to the situation. If it is agreed in the contract that registration and filing procedures are the effective conditions for the pre-sale contract of commercial housing, it will be handled in principle according to the agreement, except that one party to the contract has fulfilled its main obligations and the other party accepts it. If it is not agreed, it cannot be used as a legal defense to claim that the contract is invalid.

2, the so-called commercial housing contract registration, is the developer and commercial housing buyers signed a commercial housing sales contract, according to the law, the contract will be sent to the real estate authorities for review and registration.

Legal basis: Article 502 of the Civil Code of the People's Republic of China, a contract established according to law shall come into effect upon its establishment, unless it is otherwise stipulated by law or agreed by the parties.

In accordance with the provisions of laws and administrative regulations, if the contract should go through the formalities of approval, such provisions shall prevail. If the failure to go through the formalities of approval and so on affects the effectiveness of the contract, it will not affect the performance of the obligation clauses such as approval and the effectiveness of relevant clauses in the contract. If the party who should go through the formalities of applying for approval fails to perform his obligations, the other party may request him to bear the responsibility for violating the obligations.

In accordance with the provisions of laws and administrative regulations, the provisions of the preceding paragraph shall apply to the modification, assignment and dissolution of the contract, which should be approved.