
Originally Posted by
joypulv
... If she left a will, there may be heirs. If she left no will, there may be next of kin who inherit according to state law. ...
Actually, "heirs" are the persons who would inherit by operation of law. If there was a will, the devisees named in that will inherit instead of those heirs.
But if the previous owner died without children (or other close relatives perhaps), my guess is that there was no probate case filed.

Originally Posted by
Fr_Chuck
... to find out the land is owned by someone else, who has no proof of knowledge of a sales contact 25 years ago. Do they still have cancelled checks, loan documnets and proof they paid the land off back then,
If they go to court how will they even prove they paid for it, if they don't have any records
If OP's title search shows someone else with paper title, that person would be one of those named in the quiet title action. Proof of payment would not be really necessary because it appears that the parents have an excellent case for adverse possession. Anyone opposing their claim would have to explain what, if anything, that person did within the past 25 years to assert his or her ownership rights.