When I come to sell my car and complete the “log book” How can I assure myself that the new owner will complete (correctly) their part of the logbook and send off to DVLA? The only foolproof way of doing this (to my calculations) is to witness the new owner complete their section and watch them post it to DVAL in a mailbox. (This assumes that one can assure oneself that the details they complete are bona fide). A friend of mine has recently been fined for driving the wrong way up a one-way street in his old car some 2 months after selling it! No amount of reasoning with DVLA would change their mind and he had to pay.