I, too, received a "PCN" from Parking Collection Services limited, working for Searchlight Parking, regarding an unpaid charge for "display of expired parking ticket". This has been followed up by increasingly threatening letters from Debt Recovery Plus.
Unfortunately, it now seems, I replied to the first three letters, finally denying that I was the driver at the time, after being challenged on this. I understand that these charges (now risen to £200 if I do not send immediate payment of £95, plus the threat of a County Court Action) are unlikely to be enforceable. However, I do worry about them and lose sleep over them. On the other hand, I am determined not to give in to this harassment.
I have now read the advice given on this site and that of pepipoo and feel my fears are (probably) groundless. I also realize that I should not have risen to the bait by responding to these letters. I know I am being stupid but I can't help worrying about the mere possibility of being taken to court for a perceived parking overstay of 16 minutes. Surely not?
Any advice will be gratefully received.