What do I do when a re-conveyance was never filed? Help!

[Michael Spittler]

So this is a bit of a special instance and I have no idea what my options are but last year I had a family member give me a property that he has owned for nearly 12 years. He was no longer able to maintain the property due to his health so he gave me his house in exchange for staying with me. During a title search on the property it was discovered that there was a $3,000 seller carry when he purchased the property back in 2005. He assured me that he paid the previous owner what he owed her and I have no reason not to believe him. However in an attempt to get this cleared up I contacted her and she said that during that time she received no money from him, in fact she said that she never carried any balance for him. She is not claiming he owes her anything, but also is telling me that she never received anything. So how do I move forward with filing a re-conveyance to get that removed if she refuses to sign anything saying that my brother does not owe her anything? Is there a way to get something like that cleared since it is 12 years old and no one has ever spoke up to say there is an unsettled debt? 

Thanks for reading