Home / Tools / Motion Explainer / Motion to Join Parties
Procedural

Motion to Join Parties

Asks the court to add a person or entity needed for fair and complete resolution of the case.

Governing rule
Fed. R. Civ. P. 19, 20, 21
Read the rule

What it is

A request to add a person or entity to the lawsuit because the court cannot fairly resolve the dispute without them or because related claims should proceed together. Joinder motions focus on efficiency, fairness, jurisdiction, and whether the absent party is required.

When it's used

Filed when a party believes another person has a stake in the dispute, may be liable, may need to provide relief, or may be prejudiced by a judgment entered without them.

What the other side does

The opposing side may argue the proposed party is unnecessary, joinder would destroy jurisdiction, the claims are unrelated, or the request is too late and prejudicial.

Common outcomes

The court may order joinder, deny joinder, allow amendment to add a party, or in rare cases dismiss the action if a required party cannot be joined.

Not legal advice. Motion practice varies by court, judge, and case type. Local rules and standing orders frequently modify the federal defaults shown here. If you're facing a motion or considering filing one, talk to a lawyer about strategy and timing for your specific case.