Re: It is not illegal to bill someone even if its not for anything.
Tell me about it. I got a very sinister letter from a collections company (let's call them Explorian) saying that I didn't pay a electricity bill that was due four years ago. I had the receipts but it was not proof enough, I had to get an appointment with (dun dun dun) the collections company to plead my case otherwise they would include my name on the Deadbeat Losers Records and try to get credit for anything then muhahaha.
I went to the office of the energy company, who told me that all was OK and I wasn't in debt and they had no idea where Explorian got that information but maybe I was days late in the payment of that bill (when it was due) and they got that record but we were OK, we were cool.
So I got my appointment with Explorian. The person that talked to me told me that it was a mistake, haha, sorry for you wasting your time. I asked 1) why did I had to go to their office instead of calling, 2) why did they decide to act on a bill that was paid for, and four years old; 3) how could I be sure that that "obvious misunderstanding" wasn't going to happen again. She told me that I had to get another appointment, in a month or so, with a supervisor, to file a complaint. I decided not to.
I had more simple, honest, straightforward business transactions while buying pot for my cat.