I think this stuff happens quite often.
I had a friend that moved with one of those rental truck companies (don't care to mention which one, because the story is not their fault). One that operates out of places that (typically) do other business besides renting trucks but rents trucks on the side. Anyway, after moving his stuff, the drop-off location was a towing company. The towing company said if the truck was dropped off after hours to just park it in the street outfront, as the gate would be locked, and leave the keys in the drop box. My friend did exactly this.
A month later, my friend gets a bill for $2600+
The same towing company towed the truck because parking on the street is illegal. They towed it to another lot of theirs. That was the first ~$1300. The next morning, they towed it back, to the original lot, the second ~$1300.
This begs the question:
Why have a drop box if you can only park the truck illegally to use said drop box?
Why, when they had the keys, did they tow it back and not just drive it back?
I often wonder if they even ever towed it or just put it inside.
Anyway, my friend made a storm out of the whole thing. Contacting the trucking company, the BBB, a lawyer and everything. Eventually, the towing company claimed the person who did all the misdeeds had been fired and the bill just disappeared.