Relinquishment deed not registered but it's notarized

This discussion explores the validity of a relinquishment deed that was notarised but not registered. The user's sister is now reneging on a 1998 relinquishment of property share, demanding money. The consensus is that an unregistered release deed is not valid in the eyes of the law for immovable property, as registration is mandatory. The conversation also touches upon the potential emotional or financial coercion involved in the original relinquishment.