Thank you for you prompt reply and service. So with all that in mind, they do not really have a case legally against me if they take me to small claims court as they suggest? I have found the original advert I used and there is no mention of me suggesting it was not a cat D car. the only thing I put in was a statement saying the car is "mechanically sound with no issues to speak of" but I don't think this would warrant what you suggested about the write off category.. During the telephone conversation I had with the buyer I stated that I knew nothing of this condition and did state that we sold the car as seen, which he was happy with and agreed a price then I produced a receipt for him which we both signed and dated. I also said he should of carried out his check such as HPI, but they still seem to think they are due recompense from me or someone. Just a bit un-nerving thinking that someone has their sights set on you for something like this. Thank you for you time.