Parking in the UK was a nightmare for me. I don’t remember the specifics, but either a 1 or an I is a valid character for a license plate, and the other isn’t valid. The app used standard iPhone fonts such that the one that will never exist in the UK looked exactly like the WRONG character on my phone.
I got a parking ticket from the first parking lot we parked in on that trip, within just a few moments of walking out of the lot.
I had screenshots and everything that showed that I paid, and the language the company used on its tickets and also appeals process was completely foreign to me, an American.
Total nightmare but after many rounds of back and forth I was able to successfully appeal, and then get them to explain to me in more plain language that it actually was successful.