Also known as: impairs or impedes · impaired or impeded · impairing or impeding
Written by attorneys · grounded in primary & secondary sources — see below
An effect on a nonparty's position arising when a court resolves litigation without that person's participation. The effect occurs when the resolution would practically hinder the nonparty's capacity to safeguard a claimed interest relating to the subject matter.
Harbor Shield sued its insurer for fire-loss coverage on a mortgaged building. Harbor Bank held a loss-payee interest under the policy and was foreclosing in state court. The court ordered Harbor Bank joined because a coverage judgment entered without it would practically constrain the bank's ability to assert its priority right to the proceeds.
Plaintiffs sought to certify a class of asbestos claimants against a manufacturer with finite insurance assets. Separate individual suits risked exhausting the fund before later claimants could recover. The court certified the class under the rule because individual adjudications would as a practical matter dispose of the interests of absent class members.
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NovaSoft sued its cloud provider for deleting customer data. Vertex Capital held a side agreement granting it priority rights in the data and any recovery. Vertex moved to intervene because a judgment allocating the data or damages without it would practically impair its ability to enforce its contractual priority.
Claimants sued a manufacturer whose insurance assets could not cover all potential recoveries. Individual suits threatened to exhaust the fund before later claimants could litigate. The court recognized that separate adjudications would practically impair absent claimants' ability to protect their shares of the limited resources.
Applicants challenged a law school's admissions policy. Proposed intervenors asserted interests in preserving the policy's diversity goals. The court allowed intervention because a ruling striking down the policy would practically impair the intervenors' ability to protect their claimed stake in the admissions process.
Plaintiffs proposed a class settlement covering future asbestos claims against multiple manufacturers. Absent class members held interests in the settlement fund. The court noted that individual suits could practically impair those members' ability to protect their interests in the limited compensation available.
A person must be joined if feasible when that person claims an interest relating to the subject of the action and is so situated that disposing of the action in the person's absence may as a practical matter impair or impede the person's ability to protect that interest. The rule focuses on practical effects rather than formal preclusion.
Supporting sources
The complete-relief prong protects existing parties by ensuring the court can fully resolve the dispute among those already before it. The impair-or-impede prong instead protects the absent person's own ability to safeguard a claimed interest even when complete relief among the present parties remains possible.
Supporting sources
Certification is appropriate when separate actions would as a practical matter be dispositive of the interests of other class members or substantially impair or impede their ability to protect those interests. Classic examples include limited-fund cases where individual recoveries could exhaust shared assets.
Supporting sources
Intervention as of right is required on timely motion when the applicant claims an interest relating to the property or transaction that is the subject of the action and is so situated that disposing of the action may as a practical matter impair or impede the applicant's ability to protect that interest, unless existing parties adequately represent it.
Supporting sources
…which is the subject of the action and the applicant is so situated that the disposition of the action may as a practical matter impair or impede the applicant's ability to protect that interest, unless the applicant's interest is adequately represented by existing parties. In this circuit, proposed intervenors must establish four…