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An individual who has an interest in the substantive issue of a legal action of such a nature that a final decree cannot be handed down without that interest being affected or without leaving the controversy in a condition whereby its final determination would be totally Unconscionable.
n. a person or entity which must be included in a law suit so that the court can make a final judgment or order that will conclude the controversy. Example: Ned Neighbor brings an action to enforce his claimed right to cross the property of Oliver and Olivia Owner, but only names Oliver as a defendant. To make it possible for the court to order the property owners to honor Ned's easement, Olivia as a co-owner is an indispensable party. The procedural solution is for Neighbor to amend his complaint or petition to join Olivia as a defendant.
indispensable partynoun added party, compullory defendant, compulsory party, critical added party, essential party, imperative party, mandatory party, obligatory party, required party, requisite party, vital party
Associated concepts: indispensable party to an action, mooion to dismiss for failure to join an indispensable party