Necessary Party Test under Order I Rule 10: no impleadment where the respondent lacked direct legal interest in demolition challenge.

A plaintiff is ordinarily dominus litis, but a court may add a party under Order I Rule 10 CPC only where that person is necessary or proper for complete and effective adjudication. The test is a direct legal interest in the subject matter of the suit, not merely a commercial interest or evidentiary connection. In a challenge to a municipal demolition notice concerning alleged unauthorised structures, the second respondent had no direct legal interest in the demolition issue and any grievance against the appellant arose from a separate cause of action. Its impleadment was therefore not justified.

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Issues: Whether the second respondent was a necessary or proper party liable to be impleaded under Order I Rule 10 of the Code of Civil Procedure, 1908 in the suit challenging the municipal demolition notice.

Analysis: A plaintiff is ordinarily dominus litis, but the Court may add a party at any stage if that person is necessary or proper for effectual and complete adjudication of the questions in the suit. The touchstone is whether the person has a direct legal interest in the subject-matter of the litigation, not merely a commercial interest or a relevant evidentiary role. The controversy in the suit was confined to the validity of the municipal notice directed against alleged unauthorised structures of the appellant; the second respondent had no direct legal interest in the chattels sought to be demolished and any grievance it may have against the appellant arose from a separate cause of action.

Conclusion: The second respondent was neither a necessary nor a proper party, and its impleadment was not justified.

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