There are some documents of which registration is optional. Which are those documents? Explain the effects of registration.

Section 18 of the Registration Act, 1908 lists the documents whose registration is left to the choice of the parties rather than being compelled by law, and once such a document is voluntarily registered, it acquires certain legal advantages under Sections 47, 48, and 50 that an unregistered document of the same kind would not enjoy.

Documents of Optional Registration — Section 18

Section 18 enumerates six categories of documents that "may be registered" — the permissive language itself signalling that registration here is a matter of choice, not obligation.

Clause (a) covers instruments, other than instruments of gift and wills, which purport or operate to create, declare, assign, limit or extinguish, whether in present or in future, any right, title or interest, whether vested or contingent, to or in immovable property, but only where the value of that right is less than one hundred rupees. This is essentially the mirror image of Section 17(1)(b) — the same class of transaction, but falling below the value threshold that triggers compulsion. Since instruments of gift are separately and compulsorily registrable under Section 17(1)(a) regardless of value, and wills are governed by their own distinct regime under Sections 40 and 41, both are expressly carved out here.

Clause (b) covers instruments acknowledging the receipt or payment of any consideration on account of the creation, declaration, assignment, limitation or extinction of such a right, again where the value is below the Rs 100 threshold — the optional counterpart to Section 17(1)(c).

Clause (c) covers leases of immovable property for any term not exceeding one year, and also leases which have been exempted from compulsory registration by a State Government notification under the proviso to Section 17(1) — that is, short leases with a term not exceeding five years and an annual rent not exceeding fifty rupees.

Clause (cc), inserted by the amendment of 1929, covers instruments transferring or assigning a decree, order of court, or an arbitral award, where that decree, order or award itself purports to create, declare, assign, limit or extinguish a right of a value less than one hundred rupees in immovable property — the low-value counterpart to the compulsory category under Section 17(1)(e).

Clause (d) covers instruments, other than wills, which purport or operate to create, declare, assign, limit or extinguish any right, title or interest to or in movable property — since Section 17 is concerned only with immovable property, any document dealing with movable property is, at most, optionally registrable, irrespective of value.

Clause (e) covers wills themselves. A testator may, during his lifetime, present his will for registration, though he is under no obligation to do so, and its validity as a testamentary instrument is wholly unaffected by whether it is registered.

Clause (f) is the residuary category, sweeping in all other documents not required by Section 17 to be registered — a catch-all confirming that anything falling outside the compulsory list may nonetheless be registered if the parties so wish.

Illustrations

A sale deed conveying vacant land worth Rs 80 falls under clause (a) and may be registered, though it need not be, since its value is below the Rs 100 threshold prescribed in Section 17(1)(b). A lease of a residential room for eight months, or a shop let out for a term of eleven months renewable by consent, falls under clause (c) and registration is entirely at the option of the landlord and tenant. A promissory note or a hire-purchase agreement relating to a motor vehicle, being movable property, falls under clause (d) and may be registered voluntarily, though such registration is rarely undertaken in practice. A person executing a will bequeathing his estate to his children may choose to have it registered during his lifetime under clause (e), a step often taken to remove doubts about its authenticity and to guard against subsequent tampering or loss, though the will remains equally valid, revocable, and subject to probate proceedings whether registered or not.

Effect of Registering an Optional Document

Although registration of a Section 18 document is not compelled by Section 49 (since that section only visits penal consequences on documents required by Section 17), the parties who choose to register such a document gain distinct legal advantages once they do so, principally under Sections 47, 48 and 50.

Section 47 provides that a registered document operates from the time it would have commenced to operate if no registration were required — that is, registration relates back to the date of execution, and the document takes effect from that earlier date, not from the later date on which it is actually registered. This benefit applies to any registered document, whether its registration was compulsory or optional.

Section 48 provides that all non-testamentary documents duly registered under the Act and relating to any property take effect against every oral agreement or declaration relating to that property, unless such oral agreement or declaration is accompanied by, or followed by, delivery of possession and constitutes a valid transfer under any law not requiring writing. This means that once a document — even one optionally registered — is duly registered, it prevails over a competing unregistered oral claim to the same property, since registration is treated as conferring a superior, publicly notified title.

Section 50 goes further and provides that every document registered under clauses (a) to (d) of Section 17(1), or under clauses (a) and (b) of Section 18 (the optional categories concerning low-value transfers and receipts), takes effect against every unregistered document relating to the same property, irrespective of whether such unregistered document was executed before or after the registered one, and irrespective of whether such registration was compulsory or optional. This is a significant statutory advantage: by choosing to register even a low-value transaction that the law did not otherwise compel, the parties obtain priority over a rival unregistered claim, even one created earlier in point of time.

There is also an evidentiary dimension. A registered document, once admitted to registration under Sections 58 to 61, carries with it the endorsements and certificate of the registering officer, which raises a presumption of due execution and affords stronger evidentiary value than an unregistered instrument, which may face difficulties of proof under the Indian Evidence Act, particularly where the original is lost or where execution is disputed. Courts have consistently recognised that registration, whether compulsory or voluntary, lends solemnity and evidentiary weight to a document, since the process before the registering officer — involving admission of execution, identification of parties, and endorsement — creates a contemporaneous public record that is difficult to controvert at a later stage.

The Supreme Court's reasoning in cases dealing with the general sanctity of registered instruments — for instance, the observations regarding the effect of registration in the context of powers of attorney and sale transactions in Suraj Lamp and Industries Pvt. Ltd. v. State of Haryana — reinforces that registration serves the object of public notice and evidentiary certainty regardless of whether the particular document belonged to the compulsory or the optional class; the difference between the two categories lies only in whether registration is a precondition to legal effect (as under Section 49 for Section 17 documents) or merely a matter of prudent choice yielding the ancillary benefits described above (for Section 18 documents).

Comparative Summary