What should the owner do if the property loses its key?

If the property loses the key to custody, causing the owner to suffer losses, then the property should be responsible for compensating the owner for the losses. The owner may require the property to give reasonable compensation according to the losses, including but not limited to replacing locks, providing safety solutions or compensating the corresponding economic losses.

If the owner's safety is threatened by the loss of keys, the owner can also ask the property to take measures to ensure their safety as soon as possible, such as providing temporary accommodation or strengthening safety protection.

If no agreement can be reached on compensation, the owner can solve the dispute through legal channels. Please note that the owner should keep relevant evidence in this process so as to prove the negligence of the property and his own losses in legal proceedings.