If the dealer is whom you were paying the loan to, then yes. If a lender/bank held the note, then the lender/bank should be letting you know if the loan still has a defficiency balance that needs to be paid. Either way though, you should be notified of what was done--- Now you might make a phone call or two and find out now instead of later. Besides, if the loan was totally paid off, you should have something showing that there is a zero balance.
you use "of" with disposed
how is silver nitrate disposed of
On your chest
it was disposed in space by arcrafts
My dog is disposed to like people. I'm waiting until all of the paper plates from dinner have been disposed of.
how was trash disposed 1000 years ago
Disposed OF (one "f") is correct-meaning to get rid of; not "disposed off"
waste in the sugar factory is disposed often by using hands
"Disposed" in this instance simply means that the charge was "settled," "attended to," or "handled."
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The past tense of "disposition" used as a verb would be "disposed."
"Disposed cases" generally means cases which have been decided.