Del. Fam. Ct. R. Civ. P. 25
(a) Death.
(1) If a party dies and the claim is not thereby extinguished, the Court may order substitution of the proper parties. The motion for substitution may be made by any party or by the successors or representatives of the deceased party and, together with the notice of hearing, shall be served on the parties as provided in Rule 5 and upon persons not parties in the manner provided in Rule 4 for the service of a summons, and may be served in any county. Unless the motion for substitution is made not later than 90 days after the death is suggested upon the record by service of a statement of the fact of the death as provided herein for the service of the motion, the action shall be dismissed as to the deceased party.
(2) In the event of the death of one or more of the petitioners or of one or more of the respondents in an action in which the right sought to be enforced survives only to the surviving petitioners or only against the surviving respondents the action does not abate. The death shall be suggested upon the record and the action shall proceed in favor of or against the surviving parties.
(b) Incompetency. If a party becomes incompetent, the Court upon motion served as provided in subdivision (a) of this Rule may allow the action to be continued by or against that party's representative.
(c) Transfer of interest. In case of any transfer of interest, the action may be continued by or against the original party, unless the Court upon motion directs the person to whom the interest is transferred to be substituted in the action or joined with the original party. Service of the motion shall be made as provided in subdivision (a) of this Rule.
(d) Public officers; death or separation from office.
(1) When an officer of the State of Delaware, a county, city or other governmental agency is a party to an action in an official capacity and during its pendency dies, resigns, or otherwise ceases to hold office, the action does not abate and the successor is automatically substituted as a party. Proceedings following the substitution shall be in the name of the substituted party, but any misnomer not affecting the substantial rights of the parties shall be disregarded. An order of substitution may be entered at any time, but the omission to enter such an order shall not affect the situation.
(2) When an officer of the State of Delaware, county, city or other governmental agency files an action or an action is filed against the official in the official capacity, the official may be described as a party by the official title rather than by name; but the Court may require the name to be added.
Del. Fam. Ct. R. Civ. P. 25