On a recent day out to London with a friend, as he parked his car at Hillingdon Tube Station, I paid the daily £5 charge at the appropriate machine. On our return later in the day, we found a parking ticket on the screen intimating a £75 fine. It turned out that I had not collected the appropriate ticket from the machine, but had collected the credit card receipt of the previous user, which we then put inside the windscreen. A combination of stupidity and myopia. The resident attendant could not alter the situation - but was most helpful by pointing out that there is a small camera within the machine, so my friend sent a letter of appeal to NCP head office Northampton, as well as a passport type photo of myself. NCP have since responded to him cancelling the fine 'on this occasion'. Perhaps it was the amusement factor that persuaded them - but many thanks to NCP, whatever the reason.