Nothing like being very late with a reply but

I have seen cases where the owner, was just a half owner of the property in the first place. If the property is titled to Mr. And Mrs. And you enter into contract with Mr… You just have partial claim. If Mr. Dies…Mrs. Retains her portion and if the property was willed to the other spouse, your claim is further removed.
Many elder persons property is caught in estate recovery issues, spend down scenarios, reverse mortgage scams…not fully untangled until the death of one or both parties…