This is why I tell all my lads every job should have a banner on it.
I've lost count the amount of times a builder or roofer has either given us the wrong address or they have done one part way through a job after a fall out with their customer leaving them clueless as to who's gear they have sitting around their home.
I have even had phone calls from said customers that have sacked their builders saying I have scaffolding round my house I have no clue who it belongs to but it's yours if you come and strip it. Never done that and never would but I know others that would do!