I bought a car last year with this notification as an actual requirement - his DMV even made it easy by providing the required form as a perforated "tear-off" slip attached to the original title. Upon transfer of ownership to me, he failed to tear this part off the title and send to his DMV as notification of sale, along with taking off his old plates. His mistake became very useful when he failed to come through with the extra original car parts he *said* he'd include with my purchase, but never produced, he just kept making excuses.

So I held onto the Notification of Sale Document and old plates. One day, months later, he texted me about that form, and that he had found the extra parts.
What a tool.
- Art