Key Points: - The nature and substance of a document is determined by its terms and recitals, not its nomenclature or pleadings of the party introducing it. (!) [1000572160016] - Exhibits B-21 and B-22 involve relinquishment of rights in immovable property, making them compulsorily registrable under Section 17(1)(b) of the Registration Act, 1908, and inadmissible for proving partition without registration per Section 49. [1000572160015][1000572160016] - Unregistered documents in a partition suit cannot be used for division of joint properties by metes and bounds (primary purpose) but can be relied upon for collateral purposes like severancy of title and nature of possession of shares. [1000572160017] - For collateral use, unregistered and unstamped documents must be properly stamped, impounded, and subject to proof and relevance. [1000572160017][1000572160018] - Trial Court and High Court erred in rejecting Exhibits B-21 and B-22 entirely; appeal partly allowed to permit marking for collateral purpose after compliance. [1000572160008][1000572160018] - Section 49 proviso allows unregistered documents as evidence of collateral transactions not requiring registration. (!) [1000572160017]

What determines the nature and admissibility of a document? [p_16][1000572160016]

Whether Exhibits B21 and B22 are admissible in evidence as compulsorily registerable documents? [p_16]

Whether unregistered documents are admissible for collateral purpose in a partition suit? [p_17]