Ind. R. Civ. P. 19

As amended through April 3, 2024
Rule 19 - Joinder of Person Needed for Just Adjudication
(A) Persons to be joined if feasible. A person who is subject to service of process shall be joined as a party in the action if:
(1) in his absence complete relief cannot be accorded among those already parties; or
(2) he claims an interest relating to the subject of the action and is so situated that the disposition of the action in his absence may:
(a) as a practical matter impair or impede his ability to protect that interest, or
(b) leave any of the persons already parties subject to a substantial risk of incurring double, multiple, or otherwise inconsistent obligations by reason of his claimed interest.

If he has not been so joined, the court shall order that he be made a party. If he should join as a plaintiff but refuses to do so, he may be made a defendant.

(B) Determination by court whenever joinder not feasible. Notwithstanding subdivision (A) of this rule when a person described in subsection (1) or (2) thereof is not made a party, the court may treat the absent party as not indispensable and allow the action to proceed without him; or the court may treat such absent party as indispensable and dismiss the action if he is not subject to process. In determining whether or not a party is indispensable the court in its discretion and in equity and good conscience shall consider the following factors:
(1) the extent to which a judgment rendered in the person's absence might be prejudicial to him or those already parties;
(2) the extent to which, by protective provisions in the judgment, by the shaping of relief, or other measures, the prejudice can be lessened or avoided;
(3) whether a judgment rendered in the person's absence will be adequate;
(4) whether the plaintiff will have an adequate remedy if the action is dismissed for nonjoinder.
(C) Pleading nonjoinder. Nonjoinder under this rule may be raised by motion as provided in Rule 12(B)(7).
(D) Exception of class actions. This rule is subject to the provisions of Rule 23.
(E) Parties not indispensable-Joinder of obligors, assignors, and subrogees and subrogors.
(1) Joint obligors. Joinder of all the parties to a joint and several obligation and to a joint obligation, including a partnership obligation, shall not be required, and joint or separate action may be brought against one or more of such obligors who shall be subject to permissive joinder as provided in Rule 20. A judgment against fewer than all does not merge or bar the claim against those not made parties for that reason.
(2) Assignor of claim. Joinder of the assignor or transferor of a claim or chose in action shall not be required in a suit by the assignee who establishes his title by appropriate pleading and proof, but such assignor or transferor shall be subject to permissive joinder as provided in Rule 20.
(3) Subrogation.
(a) A subrogor may enforce the claim to the extent of his interest or in full without joining the subrogee.
(b) The subrogee may enforce the claim to the extent that he establishes his title or interest by appropriate pleading and proof without joining the subrogor.
(c) In such cases the subrogor or subrogee shall be subject to permissive joinder as provided in Rule 20.

Any recovery by the subrogor to the extent that such recovery is owned by a subrogee shall be made as representative and trustee for the subrogee.

(F) Governmental organizations and representatives thereof as parties. Suits by or against a governmental organization or governmental representative relating to the acts, power or authority of such organization or representative, including acts under purported power or authority or color thereof by such organization or representative, shall be governed by this provision.
(1) Suits by or against a governmental organization or against a representative in his official capacity shall be brought in the name of the governmental organization. Suits naming a governmental representative by his official title or by his name along with his official title shall be deemed to name and include the governmental organization which he represents, and suits naming an unofficial branch, office or unit of a governmental organization shall be deemed to name and include the governmental organization of which it is a part; but the court upon its own motion or the motion of any party may require the omitted and proper governmental organization to be included at any time.
(2) Other government organizations and governmental representatives of the same or other governmental organizations may be joined or made parties to suits in which a governmental organization is named as a party in accordance with the provisions of these rules relating to parties. Failure to name, or improper naming of a governmental organization or a governmental representative shall be subject to the provisions of these rules relating to parties.
(3) A judgment for or against a governmental organization shall also bind affected or successive representatives of such organization. When a governmental representative is named as a party in his individual name or in his individual name along with his official title, the judgment, in an appropriate case, may bind him in his individual capacity, but no judgment against him in his individual capacity shall be rendered against him unless he is so named. No action against a governmental organization or against a governmental representative in his official capacity shall be abated, affected or delayed because of the death, incapacity or replacement of a named or unnamed governmental representative, or because of the fact that the name, functions or existence of the governmental organization have been altered or terminated. In either case the action shall proceed without substitution of successors who shall be bound by the judgment in their official capacity.

Ind. R. Civ. P. 19