Can the house that can be paid by installment prove that the five certificates are complete?

There is no necessary connection between the installment payment of the house and the completeness of the five certificates. Complete five certificates are things that need to be inquired before buying a house. The house installment payment is the advance payment after the house is confirmed, and there is no necessary connection between them. If the five certificates are complete, you can log on to the local real estate information network. Take Kunming as an example, log on to "Kunming Real Estate Information Network" (http://www.kmhouse.org/), enter the home page, click on the "Pre-sale Permit" column, and enter the name of the project to be queried, then you can search whether the project has a "Pre-sale Permit". It is worth mentioning that most buildings enter the pre-sale permit system with the name of filing (filing name), and the filing name of some projects is different from the actual street name. When inquiring about the pre-sale permit, buyers need to enter the name of the record to search whether the project has a pre-sale permit.