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You can get the information you want by contacting the Nevada DMV and giving them the VIN Number of the Motor Home. Ask them for a copy of the registration. That should also tell you the name of the lienholder.
In order to find out if they paid your grandmother in full, you must make a demand in writing as if they did not pay in full. You have to put them on the defensive by saying something like this,
As representative of the Estate of (Name of your grandmother) , It has come to my attention that you purchased (Describe motor home) from (Name of your grandmother) on __________ date, but have not paid the full purchase price, etc.
Then, you would demand payment in full and if they do not show you receipts or proof of payment, you must be prepared to sue them and they will have the burden of proving that they paid in full. If they cannot prove that they paid, you will get judgment in your favor,
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