Way back when ..... we moved into our house and I drew up a snag list for the builders, sent it onto them requested they contact me for access, I came home one evening to discover they had been into my house and completed some of the snag list, they used our kitchen for their breaks but left the dirty ware in the sink., they also used some of my material (filler, paint, etc.) to complete the jobs - these were upstairs in a spare room - obvioulsy had a good look round the house. I complained and all I got was a set of keys returned. Another day, I returned home to discover that they (it must have been them) had borrowed a hammer and nail bar to work on someone elses house.
We added another lock an that finished that.