FRCP Rule 17 Capacity Guide

The Real Party in Interest Requirement

Rule 17(a)(1) requires that every action be prosecuted in the name of the real party in interest. The real party in interest is the person or entity who holds the substantive right being enforced — not necessarily the person who would benefit from the outcome or the person who hired the attorney. If someone other than the real party in interest files the lawsuit, the defendant can move to dismiss or require substitution.

The rule provides an important list of exceptions. Executors, administrators, guardians, bailees, trustees of express trusts, parties to contracts made for another's benefit, and others expressly authorized by statute may sue in their own names without joining the person for whose benefit the action is brought. These categories reflect situations where someone is legally empowered to assert another's rights.

A common real-party-in-interest issue arises in assignment and subrogation cases. If a party has fully assigned a claim to another, the assignee is the real party in interest and must file suit. If the original claimant files instead, the defendant can raise Rule 17 as a defense. In partial assignment or subrogation situations, the analysis becomes more complex and often requires joining both parties.

Rule 17(a)(3) provides an important safety valve: a court may not dismiss a case for failure to prosecute in the name of the real party in interest until it has given a reasonable time for the real party to ratify, join, or be substituted. This prevents harsh dismissals where the defect is technical rather than substantive.

Capacity to Sue and Be Sued

Capacity is a different concept from real party in interest. Capacity refers to a party's legal ability to sue or be sued at all. Rule 17(b) provides the governing rules, and they depend on who or what the party is. For individuals, capacity is determined by the law of their domicile. For corporations, capacity is determined by the law of the state where the corporation was incorporated.

For partnerships, unincorporated associations, and other entities, the analysis is more nuanced. Rule 17(b)(3) provides that in federal court, an unincorporated association's capacity to sue or be sued is determined by applicable federal law or, if there is none, by the law of the state where the court sits. This means a partnership that can sue under state law may not have capacity to sue in federal court, depending on the claim.

Capacity must exist at the time the action is filed. If a corporation was dissolved before the lawsuit was filed, it may lack capacity to sue, depending on state dissolution law. Similarly, if a business has its corporate charter revoked for failure to pay state franchise taxes, it may lose its legal capacity to maintain a federal action until the charter is reinstated.

Suing on Behalf of Minors and Incompetent Persons

Rule 17(c) addresses the special situation of minors and persons who are legally incompetent. A minor or an incompetent person must be represented by a guardian, conservator, or another like fiduciary. If no representative has been appointed, the court must appoint a guardian ad litem — a representative appointed specifically for the lawsuit — or issue another order to protect the minor or incompetent person.

The guardian ad litem is not the same as a guardian under state law. A guardian ad litem is appointed solely for the purpose of the litigation and has authority to make litigation decisions — including whether to accept a settlement — on behalf of the protected person. Courts typically require court approval of settlements involving minors or incompetents to ensure their interests are protected.

One practical point: in personal injury cases involving minor children, many state courts require minors' settlement proceeds to be placed in a structured settlement or court-managed account until the minor reaches the age of majority. Federal courts sitting in diversity often look to state law for these procedures. Check the local rules and applicable state law before finalizing any settlement involving a minor.

How Capacity Defects Are Raised and Corrected

A lack of capacity to sue or be sued is an affirmative defense under Rule 9(a) and must be specifically pleaded in the answer. If the defendant does not raise capacity in the answer, the defense may be waived. Unlike subject matter jurisdiction, which can be raised at any time, capacity objections are generally subject to waiver if not timely asserted.

When a capacity defect is raised, the plaintiff generally has an opportunity to cure it. For a real party in interest problem, the original filer can be substituted for the real party, or the real party can ratify the original filing. Rule 17(a)(3) specifically says that ratification or substitution relates back to the date of the original filing for statute of limitations purposes, which is a critical protection.

Courts treat capacity disputes as technical rather than substantive matters, and they are generally inclined to allow cure rather than dismissal. However, the safer and cleaner practice is to research and confirm the real party in interest and legal capacity before the complaint is filed, not after a challenge is raised.

Common Rule 17 Capacity Mistakes

• ✗Filing in the name of a dissolved entity: Failing to check corporate status before filing can result in a capacity challenge if the entity was dissolved before the lawsuit was filed.
• ✗Confusing beneficiary with trustee: In trust litigation, the trustee typically holds the cause of action and must sue — filing in the beneficiary's name instead requires substitution or ratification.
• ✗Missing the guardian ad litem requirement for minors: Proceeding with a case involving a minor without proper representation can render any judgment or settlement voidable.
• ✗Failing to plead capacity defects in the answer: Defendants who discover a real party in interest problem but do not raise it in the answer may waive that defense entirely.

Common Questions About Rule 17