Void vs Unenforceable Agreement under Indian Law: Limitation, Registration, Stamping and the Difference Between a Defect of Substance and a Defect of Procedure

A void agreement has no legal existence. An unenforceable agreement has a complete legal existence but cannot be sued upon, because some procedural or formal requirement has not been satisfied. The difference is between a defect of substance and a defect of procedure, and it governs three practical questions: whether the defect can be cured, whether money paid under the arrangement can be recovered, and whether the arrangement has any legal consequences at all short of an action upon it. The Indian Contract Act, 1872 defines the first category and is silent about the second, which is supplied by the Limitation Act, the Registration Act, the Stamp Act and the general law.

1. The Two Categories

Section 2(g) and Section 10, second paragraph, Indian Contract Act, 1872

2(g). An agreement not enforceable by law is said to be void.

10, second paragraph. Nothing herein contained shall affect any law in force in India, and not hereby expressly repealed, by which any contract is required to be made in writing or in the presence of witnesses, or any law relating to the registration of documents.

The second paragraph of Section 10 is the doorway through which the unenforceable agreement enters Indian contract law. The Act does not itself impose requirements of writing, attestation or registration, but it expressly preserves every other law that does. An agreement failing such a requirement is not void under the Contract Act; its fate is determined by the statute that imposed the requirement, and that statute usually attaches a consequence short of nullity.

1.1 Defining the unenforceable agreement

An unenforceable agreement is one which satisfies every requirement of Section 10 and is therefore a valid contract in substance, but on which no action can presently be maintained because of a technical or procedural obstacle. The obstacle attaches to the remedy, not to the right. Four instances account for almost all cases in practice: a claim barred by limitation, a document that required registration and was not registered, an instrument that was not duly stamped, and an agreement required by some statute to be in a prescribed form or to be attested.

2. Limitation: The Bar on Remedy

The Limitation Act, 1963 prescribes periods within which suits must be brought. Section 3 requires a court to dismiss a suit instituted after the prescribed period even though limitation has not been set up as a defence. What the Act does not do, save in the one case of Section 27 relating to suits for possession of property, is extinguish the underlying right.

📖 Bombay Dyeing & Manufacturing Co. Ltd. v. State of Bombay, AIR 1958 SC 328

Facts: The Bombay Labour Welfare Fund Act required employers to pay into a statutory fund sums representing unpaid accumulations of wages due to workmen. The employer contended that claims to many of those wages had become barred by limitation and that the sums were therefore no longer due at all, so that the statute could not require them to be paid over.

Held: The Supreme Court rejected the contention. The law of limitation bars the remedy without extinguishing the right. A debt that has become time-barred remains a debt, and the creditor's inability to sue does not convert the obligation into a nullity. The unpaid accumulations therefore remained sums due to the workmen and could be dealt with by the statute.

Ratio: Expiry of the period of limitation destroys the remedy, not the obligation. The agreement remains valid and the debt subsists; only the action upon it is barred.

Three well-known consequences follow from this, and each of them is inexplicable if the time-barred debt were treated as void. Money paid voluntarily in satisfaction of a time-barred debt cannot be recovered back, because it was paid in discharge of an obligation that existed. A creditor holding security may retain and enforce the security even after the personal remedy is barred. And under Section 25(3) of the Contract Act a written and signed promise to pay a time-barred debt is enforceable without fresh consideration, which is an exception to Section 25 precisely because the moral obligation underlying the debt survives.

3. Registration and Stamping

3.1 Want of registration

Section 17 of the Registration Act, 1908 makes registration compulsory for specified instruments, principally those creating or extinguishing an interest in immovable property of the value of one hundred rupees and upwards. Section 49 provides that an unregistered document of that description shall not affect the immovable property and shall not be received as evidence of any transaction affecting it. The proviso, however, permits such a document to be received as evidence of a collateral transaction not required to be effected by a registered instrument, and as evidence of part performance of a contract for the purposes of Section 53A of the Transfer of Property Act, 1882. The document is therefore disabled, not destroyed.

3.2 Want of stamp

Section 35 of the Indian Stamp Act, 1899 provides that an instrument chargeable with duty shall not be admitted in evidence unless it is duly stamped, and the proviso allows it to be admitted on payment of the deficient duty together with a penalty. Non-stamping is therefore the clearest example of a curable defect. The question whether such an instrument is merely inadmissible or is void in law was settled by a seven-judge bench of the Supreme Court.

📖 In Re: Interplay Between Arbitration Agreements under the Arbitration and Conciliation Act 1996 and the Indian Stamp Act 1899, Curative Petition (C) No. 44 of 2023, decided 13 December 2023 (7 Judges)

Facts: A five-judge bench in N.N. Global Mercantile (P) Ltd. v. Indo Unique Flame Ltd. had held by majority that an arbitration agreement contained in an unstamped instrument was void and could not be said to exist in law within the meaning of Section 2(h) of the Contract Act. The far-reaching consequences of that view led to a reference to a larger bench.

Held: The seven-judge bench unanimously overruled N.N. Global on the point, together with the earlier decisions in SMS Tea Estates and Garware Wall Ropes. Non-stamping or insufficient stamping renders an instrument inadmissible in evidence under Section 35 of the Stamp Act; it does not render the agreement void, void ab initio or unenforceable, because the defect is curable on payment of duty and penalty. Objections as to stamping therefore do not fall for determination by a court at the stage of reference under Sections 8 and 11 of the Arbitration and Conciliation Act, 1996.

Ratio: Inadmissibility and voidness are different legal consequences. A curable evidentiary defect does not affect the existence or validity of the agreement, and an instrument that cannot presently be received in evidence is unenforceable, not void.

⚠ Not every want of form is merely procedural

The distinction must be drawn statute by statute. Where a law provides only that a document shall not be received in evidence, the defect is evidentiary and the agreement is unenforceable. Where a law provides that a transaction shall be void, or shall be of no effect, unless made in a prescribed manner, the consequence is substantive and the agreement is void. Section 25 of the Contract Act itself illustrates the second type: an agreement made on account of natural love and affection is enforceable only if it is in writing and registered, so the absence of that form is not a curable defect but a failure of an essential condition.

4. The Comparison Set Out

Point of difference	Void agreement	Unenforceable agreement
Nature of the defect	Substantive. An essential of Section 10 is missing, or the class is expressly declared void	Procedural or evidentiary. Every essential of Section 10 is present
Legal existence	None. The agreement is a nullity from inception	Full. The agreement is valid and the obligation subsists
Effect on the right	No right ever arose	The right subsists; only the remedy by action is barred or suspended
Curability	Incurable. No act of the parties can validate it	Commonly curable, by paying duty and penalty, by registering, or by a fresh written promise under Section 25(3)
Money voluntarily paid	Recoverable under Section 65 as an advantage received under an agreement discovered to be void	Not recoverable, because it was paid in discharge of a subsisting obligation
Collateral use of the document	None; there is nothing to use	Often permitted, as under the proviso to Section 49 of the Registration Act
Typical examples	Minor's agreement, bilateral mistake of fact, unlawful object, wagering, uncertainty	Time-barred claim, unregistered document requiring registration, insufficiently stamped instrument, want of a prescribed form

5. Why the Distinction Matters

Framing the plea. A defence that an agreement is void goes to the existence of the cause of action and may be taken at any stage. A defence of limitation must be considered by the court under Section 3 of the Limitation Act even if not pleaded, but a defence of want of stamp is raised when the document is tendered and may be met by paying the duty and penalty on the spot.
Restitution. Section 65 of the Contract Act operates where an agreement is discovered to be void or a contract becomes void. It has no application to an unenforceable agreement, because nothing was received without a legal basis.
Security and set-off. A time-barred debt may still be retained against a security in hand and may in appropriate cases be set off. A void agreement supports neither.
Severability of the defect. An unenforceable agreement may become enforceable once the defect is cured, and the contract is then enforced according to its original terms. A void agreement can only be replaced by a fresh agreement.

6. The Position Stated Shortly

A void agreement fails in substance under Section 2(g); an unenforceable agreement fails in procedure while satisfying every requirement of Section 10.
The second paragraph of Section 10 preserves every other law requiring writing, attestation or registration, and is the source of the unenforceable category.
Limitation bars the remedy and does not extinguish the right, per Bombay Dyeing v. State of Bombay, except in the case of Section 27 of the Limitation Act.
Money voluntarily paid towards a time-barred debt is irrecoverable, security may still be enforced, and Section 25(3) allows revival by a written signed promise.
An unregistered document that required registration is disabled by Section 49 of the Registration Act but may be used for a collateral purpose and for Section 53A of the Transfer of Property Act.
Non-stamping makes an instrument inadmissible under Section 35 of the Stamp Act and is a curable defect, as the seven-judge bench held in In Re: Interplay (2023), overruling N.N. Global.
Inadmissibility is not voidness; a curable evidentiary defect leaves the agreement valid.
Where a statute provides that a transaction shall be void unless made in a prescribed manner, the defect is substantive and the agreement is void, not merely unenforceable.

7. Related Topics and Provisions

Topic or provision	Connection
Void vs Voidable Contract	The first of the three comparisons in this set
Void Agreement vs Illegal Agreement	The second, dealing with unlawful objects
Agreement vs Contract	Where the unenforceable agreement sits in the basic classification
Section 2(g), Indian Contract Act	Definition of a void agreement
Section 10, Indian Contract Act	The saving of laws requiring writing and registration
Section 25(3), Indian Contract Act	Written promise to pay a time-barred debt
Section 65, Indian Contract Act	Restitution, and why it does not reach this category
Sections 3 and 27, Limitation Act, 1963	Bar on the remedy and the exception for possession
Section 49, Registration Act, 1908	Effect of non-registration and the collateral-purpose proviso
Section 35, Indian Stamp Act, 1899	Inadmissibility of an unstamped instrument and its cure