It's tricky. I paid for parking at the seaside once, but forgot to put the ticket in my car!! I put it in my handbag... what an idiot. I was given a £50 fine, and I paid it. I could have fought it, as I would have been seen on CCTV paying for the ticket, I remember seeing the cameras and thinking, 'ooo a safe car park!', but I just paid the fine seen as it was ultimately my own stupidity, despite actually paying for ticket. It's a tricky situation but in my opinion, down to the ticket buyer to check and display the ticket. I do wish you the best of luck though!