I think you are a little too worried. For this problem, the signed entrusted mortgage agreement should be aimed at loan customers and full-payment customers. If there is an explanation in the contract, it is useless. Secondly, houses become personal property after online signing, and developers usually keep basic information such as customers' ID cards, marriage certificates and household registration books. These are usually not used to do anything illegal, they are all used for archiving. Even if illegal acts are found, they can be prosecuted.

Of course, all the copies left by the developers themselves need to be signed by the customers themselves, otherwise it is meaningless.