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 between parties under whom they or any of them claim, litigating under the same title, in a Court competent to try such subsequent suit or the suit in which such issue has been subsequently raised, and has been heard and finally decided by such Court.
Explanation I.— —The expression "former suit" shall denote a suit which has been decided prior to the suit in question whether or not it was instituted prior thereto.
Explanation II.— —For the purposes of this section, the competence of a Court shall be determined irrespective of any provisions as to a right of appeal from the decision of such Court.
Explanation III.— —The matter above referred to must in the former suit have been alleged by one party and either denied or admitted, expressly or impliedly, by the other.
Explanation IV.— —Any matter which might and ought to have been made ground of defence or attack in such former suit shall be deemed to have been a matter directly and substantially in issue in such suit.
Explanation V.— —Any relief claimed in the plaint, which is not expressly granted by the decree, shall, for the purposes of this section, be deemed to have been refused.
Explanation VI.— —Where persons litigate bona fide in respect of a public right or of a private right claimed in common for themselves and others, all persons interested in such right shall, for the purposes of this section, be deemed to claim under the persons so litigating.
Explanation VII.— —The provisions of this section shall apply to a proceeding for the execution of a decree and references in this section to any suit, issue or former suit shall be construed as references, respectively, to a proceeding for the execution of the decree, question arising in such proceeding and a former proceeding for the execution of that decree.
Explanation VIII.— —An issue heard and finally decided by a Court of limited jurisdiction, competent to decide such issue, shall operate as res judicata in a subsequent suit, notwithstanding that such Court of limited jurisdiction was not competent to try such subsequent suit or the suit in which such issue has been subsequently raised.
Legal Commentary & Landmark Judgments: Section 11
Section 11 of the Code of Civil Procedure, 1908 codifies the doctrine of Res Judicata, barring any court from trying any suit or issue in which the matter directly and substantially in issue has been heard and finally decided by a competent court in a former suit between the same parties.
Explanation IV is of pivotal significance, embodying the doctrine of constructive res judicata: any matter which might and ought to have been made a ground of defense or attack in the former suit shall be deemed to have been a matter directly and substantially in issue in such suit. Explanation VIII (added in 1976) ensures that an issue decided by a court of limited jurisdiction operates as res judicata in a subsequent suit, even if the former court was not competent to try the subsequent suit.
Res judicata is an absolute jurisdictional bar. Litigants cannot split claims or withhold grounds of attack/defense for subsequent actions. To establish res judicata, the party must place the certified pleadings, issues, and judgment of the former suit on record. Constructive res judicata under Explanation IV penalizes omissions to plead available grounds in the first proceeding.