The principles governing grant of an anti-suit injunction by a Court of natural jurisdiction against a party to a suit before it restraining him from instituting and/or prosecuting the suit between the same parties, if instituted in a foreign Court of choice of the parties have been settled in Modi Entertainment v. WSG Cricket Pte. Ltd., (2003) 4 SCC 341. Following are the principles laid down by the SC:
(1) In exercising discretion to grant an anti-suit injunction the court must be satisfied of the following aspects:
(a) the defendant, against whom injunction is sought, is amenable to the personal jurisdiction of the court;
(b) if the injunction is declined, the ends of justice will be defeated and injustice will be perpetuated; and
(c) the principle of comity — respect for the court in which the commencement or continuance of action/proceeding is sought to be restrained — must be borne in mind.
(2) In a case where more forums than one are available, the court in exercise of its discretion to grant anti-suit injunction will examine as to which is the appropriate forum (forum conveniens) having regard to the convenience of the parties and may grant anti-suit injunction in regard to proceedings which are oppressive or vexatious or in a forum non-conveniens.
(3) Where jurisdiction of a court is invoked on the basis of jurisdiction clause in a contract, the recitals therein in regard to exclusive or non-exclusive jurisdiction of the court of choice of the parties are not determinative but are relevant factors and when a question arises as to the nature of jurisdiction agreed to between the parties the court has to decide the same on a true interpretation of the contract on the facts and in the circumstances of each case.
(4) A court of natural jurisdiction will not normally grant anti-suit injunction against a defendant before it where parties have agreed to submit to the exclusive jurisdiction of a court including a foreign court, a forum of their choice in regard to the commencement or continuance of proceedings in the court of choice, save in an exceptional case for good and sufficient reasons, with a view to prevent injustice in circumstances such as which permit a contracting party to be relieved of the burden of the contract; or since the date of the contract the circumstances or subsequent events have made it impossible for the party seeking injunction to prosecute the case in the court of choice because the essence of the jurisdiction of the court does not exist or because of a vis major or force majeure and the like.
(5) Where parties have agreed, under a non-exclusive jurisdiction clause, to approach a neutral foreign forum and be governed by the law applicable to it for the resolution of their disputes arising under the contract, ordinarily no anti-suit injunction will be granted in regard to proceedings in such a forum conveniens and favoured forum as it shall be presumed that the parties have thought over their convenience and all other relevant factors before submitting to the non-exclusive jurisdiction of the court of their choice which cannot be treated just as an alternative forum.
(6) A party to the contract containing jurisdiction clause cannot normally be prevented from approaching the court of choice of the parties as it would amount to aiding breach of the contract; yet when one of the parties to the jurisdiction clause approaches the court of choice in which exclusive or non-exclusive jurisdiction is created, the proceedings in that court cannot per se be treated as vexatious or oppressive nor can the court be said to be forum non-conveniens.
(7) The burden of establishing that the forum of choice is a forum nonconveniens or the proceedings therein are oppressive or vexatious
would be on the party so contending to aver and prove the same.”