I forget what REVS stands for, but you can ring the hotline and they should be able to tell you if the current owner owes any money on it and if there are any buying restrictions on the vehicle, ect.
That's about my knowledge of it. Last time I checked, it's free for a verbal and $10 for written confirmation.

You don't want to inherit any debt or have the debt collectors knocking on your door.

Ring them and ask them. Make sure you give them a rego and preferably engine and chassis numbers.