New York Laws
Article 2 - Escheat of Real Property
202 - Parties to Action.

§ 202. Parties to action. There may be made parties to such action,
all persons who would have, might have or might claim to have any
interest in or lien upon the premises so escheated or forfeited, at the
time of such escheat or forfeiture, and all persons in possession of
such real property. Where the names of the defendants are unknown, they
may be designated as "unknown defendants." The provisions of law
applicable to actions to recover real property shall apply to such
actions, except that service of the summons shall not be deemed to be
complete until, pursuant to an order of the court, the summons together
with a notice directed to the defendants setting forth the object of the
action, a brief description of the land affected, the source and manner
in and by which it is alleged that said real property shall have
escheated or forfeited to the people, and the name or names of person or
persons whose title or interest shall have so escheated or have been
forfeited, shall have been published once in each week for four
successive weeks in two newspapers designated in the order for such
publication as most likely to give notice to the defendants to be
served.