A woman wishes to sell her portion of a property that was partitioned 30 years ago via an unregistered deed. While she has individual tax records and a patta for her share, her brothers-in-law claim it's still joint property due to the unregistered deed. Legal advice suggests that even unregistered family arrangements acted upon for decades, especially with individual tax mutations and patta grants, can be legally binding and may prevent others from claiming joint ownership. Consulting a local lawyer for court validation or to explore legal recourse is recommended.