In legal procedure (both civil and criminal), misjoinder (also known as wrongful joinder) involves the improper inclusion of one or more parties or causes of action within a lawsuit.
[1] The two forms of misjoinder are:[2] According to FRCP, Rule 21,[3] 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.