Correcting non-joinder after a suit is filed requires quick, deliberate steps: first assess whether the omitted person is truly a necessary/indispensable party (can complete relief be granted without them or will their absence create inconsistent obligations), then draft and file an application to implead/add the party (or an application to amend the plaint) supported by an affidavit and the key documents showing the party’s interest. Next, seek appropriate relief from the court—ask for leave to amend, for substituted service or validation of late service if needed, and propose interim measures (stays, protective orders, or limited discovery) to prevent prejudice while the joinder application is decided. Serve the added party promptly and file proof of service; if joinder would destroy jurisdiction or is impossible, prepare the jurisdictional/Rule-19-style balancing submission explaining why the case should proceed or be stayed rather than dismissed, and plead alternative/contingent relief so remedies remain available. Throughout, document diligence, notify opposing counsel (attempt voluntary joinder or settlement if practicable), preserve the record for appeal, and move promptly—courts favor cure by impleadment over dismissal when parties act in good faith.
