What should I do if the key to the public rental house is lost by the property?

First of all, the key to the public rental house is lost. If there are valuables in it, we should change the lock of this key in our public rental house in time.

If there is nothing in the public rental house, then we can look for the key slowly and see where our key is left. If our first one has anything valuable, it should be replaced in time.