There is also a postcard the owner is supposed to send to the FAA when he sells the plane. It says he is selling the plane to so and so... On planes I've bought, I've sent it in the with bill of sale, and my request for change of ownership/registration. FAA never complained. Maybe look for it in the paperwork as well. If you need, I can make a copy and sent to you so you know what to be looking for. Just looked at one, and it's 8050-3 form. Some stated do the same. Mn. does anyway. Found it on line JImChuk