New York Consolidated Laws, Real Property Actions and Proceedings Law - RPA § 1515. Complaint

a. The plaintiff's estate or interest in the real property, the particular nature of such estate or interest, and the source from or means by which the plaintiff's estate or interest immediately accrued to him;  and if his estate or interest therein is for a term of years, that the balance remaining of such term of years is not less than five.

b. That the defendant claims, or that it appears from the public records or from the allegations of the complaint, that the defendant might claim an estate or interest in the real property, adverse to that of the plaintiff, and the particular nature of such estate or interest.  Where the people of the state of New York are made a party defendant, as provided in this article, the summons and complaint must be served upon the attorney-general who must appear in behalf of the people, and the complaint shall set forth detailed facts showing the particular nature of the estate or interest and the reason for making the people a party defendant.  Upon failure to state such facts, the complaint shall be dismissed as to the people of the state of New York.

c. Whether any defendant is known or unknown, and whether any defendant is or might be an infant, have a developmental disability or mental illness, or abuse alcohol.

d. Whether the judgment will or might affect a person or persons not in being or ascertained at the commencement of the action, who by any contingency contained in a devise or grant or otherwise, could afterward become entitled to a beneficial estate or interest in the property involved;  and whether every person in being who would have been entitled to such estate or interest if such event had happened immediately before the commencement of the action is named as a party thereto.