A change in property ownership creates an uncertain period in the lifetime of a property. Many details and tasks from the routine to those that are difficult in the best of times can or do get lost in the multitude of responsibilities that are now or will be handled by new people. In this environment a property can be at its most vulnerable.
Every building has some value, even a demolished pile of rubble contains materials formerly part of infrastructure that can be valuable as scrap. Few targets can entice potential criminals or vandals like an unsecured building, with uncertain ownership making reprisal seem unlikely.
Ideally all procedures and precautions will be set in place before any transaction takes place. However when this isn’t possible and when the access to a property isn’t at least monitored a criminal activity or liability event can occur.