I know you are (somewhat) joking, and with some other car rental companies I'd laugh, but I've read the news stories about Hertz having it's innocent customers arrested, so I figured I'd check it out.

I called Hertz, told them what happened, and asked for help in processing my payment and sending me a receipt. She asked for my reservation number, and when I gave it to her she pulled it up right away. She then asked if I happened to have my rental agreement number. Since I held onto my agreement and the pre-existing damage form, I went ahead and gave her the number. She also asked me if I rented the car in the USA or overseas - I told her I rented it at the DFW airport location.

She put me on hold a while, and when she came back, she said "well, basically you got a free rental because there is no record of your actual rental in our system, only the reservation." I asked "so, you mean the rental is closed and there is nothing further to do with it?" She said "no, I mean the rental agreement number pulls up nothing in our system. Your reservation exists, but not the rental agreement. So, if you haven't been charged, it's a free rental."

I'm skeptical that Hertz won't come back later and do something crazy - they haven't exactly built trust recently. Now I have to decide if I should worry about it, or just let it go.