Thanks for replying, I have been reading other threads about DRP to get more background info. I also looked up the Supreme Court case they referenced . As many threads on this site are started previous to this case I am still wondering if this has any relevance to my situation or is it a bluff? I will ignore DRP but at this late stage should I reply at all to original invoice, as I'm sure there is limit to time period for appeal.

I received a parking charge notice after inadvertently overstaying in Sainsburys car park in January. Previously I have had a ticket whilst parked in a local Aldi and believing that it wouldn't be enforced I ignored threatening debt recovery letters and they went away . Hence I didn't worry and ignored this notice. I then received demand for payment notice from DRP for £120 . My husband told me he'd heard that things had changed and that I should have paid . On the notice from DRP they quote "landmark decision " handed down 4th November 2015 in favour of parking operator who took motorist to court for non payment of parking charge - it says that this is important test case due to complex legal arguments used by both sides. This sounds very vague to me - however I don't want to risk any consequences which might affect my credit rating or a court case . Do I pay or not? I have no valid excuse for overstaying- just didn't really realise the time . I welcome advice!