The loss of the house sales contract can be handled in the following ways: 1. You can go to the developer or the real estate bureau where the house belongs to reissue it. Generally, I will show you the original contract and then give you a copy, which will be stamped by the relevant institutions and have the same legal effect as the original. In principle, the relevant institution referred to here is the Housing and Land Bureau, also known as the Housing and Land Resources Administration. 2. If the house purchase contract is lost, you can report the loss in the newspaper, and you don't need to disclose the real estate license number, because the house purchase contract has its own contract number. 3. The loss of the purchase contract generally does not bring great risks. If the real estate license is lost, it will be in trouble. Whether it is a bank mortgage loan or the sale of real estate, you must see the original real estate license before you can handle it.

Legal basis:

"Housing Registration Measures" Article 27 If the housing ownership certificate and registration certificate are damaged, the obligee may apply to the housing registration authority for renewal. Before the house registration agency changes its certificate, it shall recover the original house ownership certificate and registration certificate, and record the relevant matters in the house registration book. If the house ownership certificate and registration certificate are lost or destroyed, the obligee may apply for a replacement after publishing a loss statement in the local public newspaper. If the house registration agency reissues it, it shall record the relevant matters in the house registration book. The reissued house ownership certificate and registration certificate shall be marked with the words "reissue". Before the ownership certificate and registration certificate of villagers' houses within the scope of collective land are reissued, the housing registration agency shall announce the replacement matters in the rural collective economic organizations where the houses are located.