I got a Bill From the DMV for my Trade In?

A question we sometimes hear at Roy's is why did I receive a Bill from the DMV for registration on the car I traded in? If the Registration becomes due before the change in ownership is established, (We all know how slow the DMV can be...) the DMV will just send the bill out to the last person they have on file.  This is pretty normal and you can just disregard it.