Res judicata, Latin for “a thing already decided”, means that once a competent court has finally decided a dispute, it cannot be litigated again between the same parties. Section 11 of the Code of Civil Procedure, 1908 (CPC) codifies this doctrine, resting on three ideas: no one should be vexed twice for the same cause, litigation should end in the public interest, and a judicial decision must be accepted as correct.

What Section 11 provides

Section 11 provides that no court shall try any suit or issue in which the matter directly and substantially in issue has been directly and substantially in issue in a former suit between the same parties, or parties under whom they claim, litigating under the same title, in a court competent to try the subsequent suit, and has been heard and finally decided by that court.

Five conditions must therefore coincide:

(1) the matter directly and substantially in issue is the same in both suits;

(2) the former suit was between the same parties or their privies;

(3) the parties litigated under the same title;

(4) the court that decided the former suit was competent to try the subsequent suit; and

(5) the matter was heard and finally decided in the former suit.

The eight Explanations in brief

ExplanationWhat it clarifies
I“Former suit” is a suit decided earlier, even if instituted later.
IICompetence is judged irrespective of a right of appeal.
IIIMatter alleged by one party and denied or admitted, expressly or impliedly, by the other.
IVMatter that might and ought to have been raised is deemed in issue.
VRelief claimed but not expressly granted is deemed refused.
VIBona fide representative suit on a common/public right binds all interested persons.
VIIApplies to execution proceedings (added, 1976 Amendment).
VIIIIssue decided by a court of limited jurisdiction, competent to decide it, still binds (added, 1976 Amendment).

Constructive res judicata

Explanation IV creates constructive res judicata: a matter that might and ought to have been raised as a ground of attack or defence in the former suit is deemed to have been in issue, even if never raised. A party must bring its whole case at once.

Relevant case laws

Satyadhyan Ghosal v. Deorjin Debi, AIR 1960 SC 941: res judicata rests on giving finality to judicial decisions — once a matter of fact or law is finally decided between two parties, neither can canvass it again.

Daryao v. State of Uttar Pradesh, AIR 1961 SC 1457: the principle applies beyond civil suits — a writ petition under Article 226 dismissed on merits bars a fresh Article 32 petition for the same relief.

Sheodan Singh v. Daryao Kunwar, AIR 1966 SC 1332: the former decision must be on merits — a dismissal for default or want of jurisdiction does not bar a later suit; but an appeal dismissed on a preliminary ground still confirms the trial court’s decision on merits.

Forward Construction Co. v. Prabhat Mandal, AIR 1986 SC 391: constructive res judicata also applies to writ proceedings — a ground available but not taken earlier cannot be raised later.

Conclusion

Section 11 is a rule of public policy. It prevents repeated harassment, conflicting decisions and waste of judicial time — but it bars a later suit only where identity of matter, parties and title is proved and the earlier decision was a final decision on merits by a competent court.

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