Is it legal to monitor whether the property is not handed over and affect the payment?

Monitoring the non-transfer of property does not affect the payment, but it is illegal. According to the relevant information, it is illegal to monitor the property without affecting the payment. The monitoring facilities and equipment in residential areas (property management areas) are usually equipped during building construction, some of which are voluntarily installed for the convenience of management, and some of which are purchased and equipped with the maintenance funds or public income of the owners. But in either case, it belongs to all the facilities and equipment owned by the owner. Even if you buy a property, it should belong to the owner. The reason is: the voluntary purchase of property is to manage the community well, and it is also for the owners of the community after purchase, so it belongs to the owners. It is reasonable and legal for the owner to request the property transfer monitoring facilities and equipment for reasonable reasons, and the property should be transferred. If the property is troublesome, it is a breach of contract to find other improper reasons to prevent the owner from taking control. Or the property did not save the surveillance video, or the surveillance video was not well saved, which caused the owner to be unable to retrieve the video, which was a breach of contract.