Keith is correct , you may have to take legal advice but I had a similar problem a couple of years ago and the owner left me a mobile phone no but no address - we now always make sure we have full contact details!! I had to put an advert in the public notices section of the main local newspaper which stated that unless the vehicle was collected & the storage costs paid in full the vehicle would be taken to a public auction to be sold to defray expenses. we were able to claim for storage & the costs of taking to the auction. think I got the legal advice from RMI helpline.