Two of my college friends shared an apartment in New Brunswick like 8 years ago. A guy claiming to be a utility worker of some sort came to their place and said the landlord had sent him for something (don't remember what). They let him in, he walked around the 2 bedroom place for a few minutes not inspecting anything in particular, just looking at the kitchen appliances, popped his head into their rooms, said he was done and left.

The following week, their house got broken into while they were out. Whoever did it stole the TVs and their gaming systems. After a few days they thought about it, called their landlord and PSE&G - nobody had been sent over to their place to inspect anything the previous week.