Resjudicata u/s 11 of CPC:
The law on the subject of Res Judicata may be stated as follows:
(1) The general rule is that all issues that arise directly and substantially in a former suit or proceeding between the same parties are res judicata in a subsequent suit or proceeding between the same parties. These would include issues of fact, mixed questions of fact and law, and issues of law.
(2) To this general proposition of law, there are certain exceptions when it comes to issues of law:
(i) Where an issue of law decided between the same parties in a former suit or proceeding relates to the jurisdiction of the Court, an erroneous decision in the former suit or proceeding is not res judicata in a subsequent suit or proceeding between the same parties, even where the issue raised in the second suit or proceeding is directly and substantially the same as that raised in the former suit or proceeding. This follows from a reading of Section 11 of the Code of Civil Procedure itself, for the Court which decides the suit has to be a Court competent to try such suit. When read with Explanation (I) to Section 11, it is obvious that both the former as well as the subsequent suit need to be decided in Courts competent to try such suits, for the “former suit” can be a suit instituted after the first suit, but which has been decided prior to the suit which was instituted earlier. An erroneous decision as to the jurisdiction of a Court cannot clothe that Court with jurisdiction where it has none. Obviously, a Civil Court cannot send a person to jail for an offence committed under the Indian Penal Code. If it does so, such a judgment would not bind a Magistrate and/or Sessions Court in a subsequent proceeding between the same parties, where the Magistrate sentences the same person for the same offence under the Penal Code. Equally, a Civil Court cannot decide a suit between a landlord and a tenant arising out of the rights claimed under a Rent Act, where the Rent Act clothes a special Court with jurisdiction to decide such suits. As an example, under Section 28 of the Bombay Rent Act, 1947, the Small Causes Court has exclusive jurisdiction to hear and decide proceedings between a landlord and a tenant in respect of rights which arise out of the Bombay Rent Act, and no other Court has jurisdiction to embark upon the same. In this case, even though the Civil Court, in the absence of the statutory bar created by the Rent Act, would have jurisdiction to decide such suits, it is the statutory bar created by the Rent Act that must be given effect to as a matter of public policy. (See, Natraj Studios (P) Ltd. v. Navrang Studios & Anr., (1981) 2 SCR 466 at
482). An erroneous decision clothing the Civil Court with jurisdiction to embark upon a suit filed by a landlord against a tenant, in respect of rights claimed under the Bombay Rent Act, would, therefore, not operate as res judicata in a subsequent suit filed before the Small Causes Court between the same parties in respect of the same matter directly and substantially in issue in the former suit.
(ii) An issue of law which arises between the same parties in a subsequent suit or proceeding is not res judicata if, by an erroneous decision given on a statutory prohibition in the former suit or proceeding, the statutory prohibition is not given effect to. This is despite the fact that the matter in issue between the parties may be the same as that directly and substantially in issue in the previous suit or proceeding. This is for the reason that in such cases, the rights of the parties are not the only matter for consideration (as is the case of an erroneous interpretation of a statute inter parties), as the public policy contained in the statutory prohibition cannot be set at naught. This is for the same reason as that contained in matters which pertain to issues of law that raise jurisdictional questions. We have seen how, in Natraj Studios (supra), it is the public policy of the statutory prohibition contained in Section 28 of the Bombay Rent Act that has to be given effect to. Likewise, the public policy contained in other statutory prohibitions, which need not necessarily go to jurisdiction of a Court, must equally be given effect to, as otherwise special principles of law are fastened upon parties when special considerations relating to public policy mandate that this cannot be done.
(iii) Another exception to this general rule follows from the matter in issue being an issue of law different from that in the previous suit or proceeding. This can happen when the issue of law in the second suit or proceeding is based on different facts from the matter directly and substantially in issue in the first suit or proceeding. Equally, where the law is altered by a competent authority since the earlier decision, the matter in issue in the subsequent suit or proceeding is not the same as in the previous suit or proceeding, because the law to be interpreted is different.
Mystery of Law and Justice 