I had one of these 'invoices' from Parking Eye last week. I visited a store with 2 hours free parking and fortunately stayed in the store almost the full 2 hours browsing, I did make some purchases, lost the receipt but paid by card and have it on my bank statement.
When I came out I visited the only other store in the visinity about 200 yards away and walked over not taking the car. When it began to dawn on me that maybe I had gone over time, ran back and moved the car, no ticket so thought it was OK. It was 4.30 pm and the car park was almost empty.
The letter and photographs came a week later £60, if not paid in 2 weeks goes up to £100. I also read all the blogs about ignoring etc. However, I decided to contact the store and the store manager told me to take the letter in, she would deal with it not to worry.
The next morning I was met by a smiling lady very pleasant and helpfull gave her the letter and bank statement. She promised to E-mail and get this charge cancelled right away and if I heard any more from them not to panick, if I call into the store later this week she will have a printout for me confirming the charges have been cancelled.
I haven't contacted Parking Eye at all, not sure if I should E-mail explaining developments so far, decided to wait until I have been back to the store. Not counting my chickens until I get the confirmation.
I understand only the landowner can issue or cancel a parking charge Parking Eye only manage the parking.