A mother in Mumbai gifted her flat to her elder son via a registered gift deed, but now wishes to revoke it due to his changed behaviour. She is seeking the original transfer documents from the society to check for legal compliance, believing a procedural flaw could expedite reclaiming ownership. Legal advice suggests the donor can revoke the deed if the donee agrees and executes a deed of cancellation, or by filing a suit for cancellation. The society's role is limited, and further details about the circumstances of the gift are needed.