I loaned money to my partner to buy a car for which he became the registered keeper. As he owed me money, he transferred the log book into my name and then drove off in the car. He has not returned, and this has been reported to the police who advise that the car ownership and retrieval is a civil matter, although they are now investigating him for fraud. He has disappeared and is not responding to messages or calls.
Until the matter is sorted, how do I respond to any traffic violation notifications he may have incurred, which are now being sent to me?