We have a property duly in joint name with my mother and father's younger brother purchased 1977. The whole amt is paid by mother and out of my father's affection he induced his brother's name as joint owner. We had faimly settlement in 1994 (orally) and he signed the relinquishment deed(unregistered as of now). He has now filed a case in court denying any settlement and deed although admitted in his cross examination that he has signed the deed. My question how can we prove our title and how can we prove that relinquishment deed is valid without registration as he has admitted it. Please advise.