Right, I understand that the plate is attached to you, when you own the car. But when the vehicle is sold, the title is transferred, a seller's report is submitted, and new plates are issued (and the old plates were from a state on the other side of the country)... it just seems like common sense to destroy the old plates, not keep using them, you know?
Of course, maybe it's common sense to remove the old plates when selling the car, but in WA we never did that (or maybe my dad just taught me wrong). In any case, just checking to see what kind of common sense is going on here.