I received a ticket from Impark recently. It's a private lot, so this is not a "real" ticket issued by the government; it's a private company notifying me of a breach of contract. The supposed violation was "blocking other customer", for my having parked slightly over the line.

I of course never signed any contract, I just paid for parking at a pay station. There was probably some sign somewhere with a shrinkwrap contract saying "by parking here you agree to [whatever]", but I didn't notice one or get a picture. Impark does not appear to make this contract available online, but I doubt that it says anything about me not being allowed to park slightly across a line. So legally I think this is unenforceable, and given that there was still plenty of room to access the car next to me, I don't think I have any moral duty to pay it either.

However, I've seen online reports that if I ever park in another Impark lot with an unpaid notice, they may tow my car. I'm having trouble finding information on whether this is legal, but even if not it would be a pain for me to have to get my car back and then fight them and/or the towing company in court. This is a problem because Impark is a massive company, they own ~3400 parking lots across the US and Canada. Having to avoid them forever would be inconvenient.

If I decide to pay their "notice", or I manage to get it voided, or Impark goes out of business, or I permanently cease to have this car or license plate, this resolves N/A. Otherwise it resolves after I park in one of their lots with this car and license plate 3 times. (In the event that I forget to check what company's lot I'm parking in, I'll take my best guess.)