Is there a way to appeal a PCN if no ticket was on the car? I only found out about it this weekend when I received it in the post a month later, and now it's too late for an informal appeal or reduced fine. It was issued by the council, not a private company.
I actually had paid for parking over the phone (not an app) via RingGo, and the parking session was valid at the time. I had to look at the sign to get the details to pay for parking but apparently was looking at the wrong sign. I would definitely have made an informal appeal on the basis of insufficient/confusing signage, but even if I'd decided to pay, it would have cost half what it will now.
There are several pics of the car, only one of which shows the ticket stuck to the car, but there was definitely no ticket when I came out and drove away. I understand that this is not a valid basis for appeal but 1) it's my first parking ticket in 15ish years of driving and 2) I would not have ignored it!