Any lien provided for in this chapter may be assigned by written instrument accompanied by delivery of possession of the vehicle subject to the lien, and the assignee may exercise the rights of a lien holder. Any lien holder assigning a lien, as authorized herein, shall at the time of assigning the lien give written notice of the assignment by certified mail to the registered and legal owner, including the name and address of the person to whom the lien is assigned.