I am considering the purchase of a used Tesla direct from the owner (in the UK). It is still under the original warranty and has been serviced by Tesla. I can get a vehicle check but with this sort of money, how can I be certain that the vendor is really the owner? (DVLA always say that the registered keeper is not necessarily the owner) Any other caveats? On a related note, if I buy a Tesla privately, how do I tell Tesla that I am the new owner?