The Supreme Court of India, in a significant five-judge Constitution Bench judgment delivered on 25 April 2023, held by a 3:2 majority that an unstamped or insufficiently stamped arbitration agreement is not enforceable in law and cannot form the basis for appointment of an arbitrator under Section 11 of the Arbitration and Conciliation Act, 1996. The majority opinion, authored by Justice K.M. Joseph and concurred in by Justice Aniruddha Bose and Justice C.T. Ravikumar, held that non-payment of stamp duty renders the underlying agreement — including the arbitration clause — inadmissible and unenforceable.
Background
The question before the Constitution Bench arose from a reference on the interplay between the Indian Stamp Act, 1899 and the Arbitration and Conciliation Act, 1996. The core issue was whether a court, while considering an application for appointment of an arbitrator under Section 11(6A) of the Arbitration Act, must examine whether the underlying agreement containing the arbitration clause is duly stamped under the Stamp Act.
The question had generated conflicting views across different benches of the Supreme Court. One line of decisions held that stamp duty deficiency is a curable defect that should not prevent the initiation of arbitration, while another line maintained that an unstamped agreement is inadmissible under Section 35 of the Stamp Act and therefore cannot be acted upon for any purpose, including referral to arbitration.
Key Holdings
The Constitution Bench, by a 3:2 majority, held:
Inadmissibility of unstamped agreements: An arbitration agreement that is contained in an unstamped or insufficiently stamped instrument is inadmissible in evidence under Section 35 of the Indian Stamp Act, 1899. Since the agreement is inadmissible, it cannot be said to "exist" for the purpose of Section 11(6A) of the Arbitration Act.
Scope of Section 11(6A) inquiry: When a court examines the "existence" of an arbitration agreement under Section 11(6A), it must go beyond merely checking whether the document contains an arbitration clause. The inquiry extends to whether the agreement is enforceable in law, which includes compliance with stamp duty requirements.
No separability for stamping purposes: The doctrine of separability — which treats the arbitration clause as independent of the main contract — does not insulate the arbitration clause from stamp duty requirements. If the main agreement is unstamped, the arbitration clause embedded within it is equally inadmissible.
Dissenting opinion: Justices Ajay Rastogi and Hrishikesh Roy dissented, holding that stamp duty deficiency is a curable defect under Section 33 of the Stamp Act and should not impede the commencement of arbitration. The dissenters favoured a pro-arbitration interpretation that would permit the tribunal to address stamp duty issues after its constitution.
Implications for Practitioners
This judgment had immediate and far-reaching consequences for arbitration practice in India. Practitioners must now ensure that the underlying agreement is duly stamped before filing any application under Section 11 for arbitrator appointment. Any stamp duty deficiency must be cured by paying the requisite duty and penalty before the court at the Section 11 stage.
However, practitioners should critically note that this judgment was subsequently referred to a larger seven-judge bench, which on 13 December 2023 overruled the NN Global majority and held that unstamped agreements are not void ab initio. The seven-judge bench restored the position that non-stamping is a curable defect that does not render the arbitration agreement non-existent.
Despite the subsequent reversal, the April 2023 judgment remains significant as it exposed the doctrinal tensions between the Stamp Act's evidence bar and the Arbitration Act's pro-arbitration presumption — a tension that any practitioner drafting or enforcing arbitration agreements must remain alert to.