Misjoinder
From Infogalactic: the planetary knowledge core
In legal procedure (both civil and criminal), misjoinder refers to a wrongful joinder.[1]
Misjoinder of causes of action, or counts, consists in joining several demands to enforce substantive rights of recovery that are distinct and contradictory.[1]
Misjoinder of parties consists in joining as plaintiffs or defendants persons who have conflicting interests, or who were not involved in the same transaction or event.[1]
Misjoinders by jurisdiction
United States
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Misjoinder of parties is not a ground for dismissing an action. On motion or on its own, the court may at any time, on just terms, add or drop a party. The court may also sever any claim against a party.