Res sub judice: stay of suit (section 10)

1. The text

Section 10 provides that no court shall proceed with the trial of any suit in which the matter in issue is also directly and substantially in issue in a previously instituted suit between the same parties, or between parties under whom they or any of them claim, litigating under the same title, where such suit is pending in the same or any other court in India having jurisdiction to grant the relief claimed, or in any court beyond the limits of India established or continued by the Central Government and having like jurisdiction, or before the Supreme Court.

The Explanation adds that the pendency of a suit in a foreign court does not preclude the courts in India from trying a suit founded on the same cause of action.

2. Object

• To prevent courts of concurrent jurisdiction from trying two parallel suits on the same matter at the same time.
• To avoid the possibility of two contradictory decisions on the same issue.
• To save the parties and the court from a multiplicity of proceedings, wasted time and expense.

Section 10 is the anticipatory partner of section 11. Section 11 bars a matter already decided; section 10 makes sure that, while a matter is still being decided, a second court does not race the first one to a decision.

3. Conditions

• Two suits, one instituted earlier than the other. The earlier one is the “previously instituted suit”; it is the later suit that is stayed. Priority is decided by the date of institution, not the date of service or of filing of written statements.
• The matter in issue in the later suit must be directly and substantially in issue in the earlier suit. A collateral or incidental overlap is not enough.
• Same parties, or parties under whom they or any of them claim.
• Litigating under the same title: in the same capacity in both suits.
• The previous suit must be pending in a court in India (or a court outside India established by the Central Government, or the Supreme Court) that is competent to grant the relief claimed in the later suit.

The Supreme Court has read the second condition strictly. In Aspi Jal v. Khushroo Rustom Dadyburjor, 2013 INSC 218, (2013) 4 SCC 333, the Court held that section 10 applies only where the whole of the subject-matter in issue in the two suits is the same, so that the decision in the earlier suit would operate as res judicata in the later one. A partial overlap of issues does not attract the section. The test is therefore whether the decision in the first suit will, on its own, decide the second.

4. What is stayed: the trial

The section bars the court from proceeding with the trial. It does not bar the institution of the later suit, and it does not prevent the court from passing interim orders in it, such as a temporary injunction or the appointment of a receiver. In Indian Bank v. Maharashtra State Co-operative Marketing Federation Ltd., 1998 INSC 217, (1998) 5 SCC 69, the Court held that “trial” in section 10 means the hearing of the suit, and the section does not stand in the way of a summary suit under Order XXXVII proceeding to the stage of deciding whether the defendant should get leave to defend.

Further points:

• A decree in violation of section 10 is not a nullity. The rule is procedural, and a decree passed in a later suit without staying it is valid, though it may be set aside on appeal.
• Waiver. Because the rule exists for the parties’ benefit, they may waive it and ask the court to proceed with the later suit.
• Mandatory once the conditions are met. The court has no discretion to refuse a stay where the conditions are satisfied.
• Inherent power. Where section 10 does not strictly apply, the court may still stay a suit, or consolidate the two suits for joint trial, under section 151 in the interests of justice.

5. Suit in a foreign court

Under the Explanation, a suit pending in a foreign court (a court outside India not established by the Central Government) does not bar the Indian court from trying a suit on the same cause of action. Both may proceed. The first to reach a judgment matters: a foreign judgment, once delivered, may be conclusive under section 13, subject to its exceptions.

6. Res sub judice and res judicata compared

• Section 10 applies to a matter pending in an earlier suit; section 11 applies to a matter already heard and finally decided.
• Section 10 bars the trial of the later suit; section 11 bars the trial of the suit or issue altogether.
• Section 10 requires the earlier suit to be the previously instituted one; under section 11 the “former suit” is the one decided first, whenever instituted (Explanation I).
• The object is common: to prevent multiplicity of proceedings and conflicting decisions.

7. Problem

A sues B in Mysuru for rent for 2024 under a lease. B, in his defence, denies the lease. While that suit is pending, A sues B in Mandya for rent for 2025 under the same lease. B applies to stay the Mandya suit under section 10. Advise.

Issue. Whether the matter in issue in the Mandya suit is directly and substantially in issue in the previously instituted Mysuru suit.

Law. Section 10 stays the trial of the later suit where the matter in issue is directly and substantially in issue in an earlier suit between the same parties under the same title, pending in a court competent to grant the relief claimed. Aspi Jal requires that the decision in the earlier suit would operate as res judicata in the later one.

Application. The parties and title are the same. The relief differs (rent for different years), but the central question in both suits is whether the lease exists, and B has put it in issue in the first suit. A finding on that question in the Mysuru suit will bind the parties in the Mandya suit. The Mysuru court can grant the relief claimed in the Mandya suit if its pecuniary limits allow.

Conclusion. The trial of the Mandya suit should be stayed until the Mysuru suit is decided. Interim relief in the Mandya suit may still be granted. If the Mysuru court lacks pecuniary jurisdiction over the later claim, section 10 does not apply, and the better course is an application to the District Court to transfer and try the suits together.

How this is examined

As a short note: “Doctrine of res sub judice” (January 2026). As an essay: “Explain the conditions for applicability of the doctrine of res sub judice” (October 2023). In the essay, quote section 10, give the objects, the five conditions with a line on each, the “trial” point from Indian Bank, the whole-subject-matter test from Aspi Jal, the foreign-suit Explanation, and close with the comparison with res judicata.