N.Y. SCT Law § 56

§ 56. Parties to the action. The plaintiff in such action shall\ninclude and join therein and may likewise recover upon all prior and\nsubsequent certificates of sale or tax deeds dated within five years of\nthe commencement of the action, held by him, executed by the treasurer\nof Suffolk county relating to the same real property in whole or in\npart. He may include and join in one action all such certificates of\nsale or tax deeds relating to two or more separate and distinct parcels\nof real property belonging to the same person or to two or more persons\nor corporations, provided, however, that all lots or parcels belonging\nto separate persons shall be distinctly set forth in separate paragraphs\nof the complaint and shall be sold under such proceedings separately. He\nshall make parties to the action the owner of and all other persons\ninterested in the real property affected, or any part thereof, including\nthe holders of all other prior and subsequent certificates of sale as\nshown by the records in the county treasurer's office at the time of the\ncommencement of such action. The county of Suffolk or the people of the\nstate may be made parties to such an action the same as a natural person\nand the summons shall be served on the attorney-general who shall appear\non behalf of the state, and the complaint shall set forth in addition to\nthe other matters required to be set forth by law, detailed facts\nshowing the particular nature of the interest in or the lien on the said\nreal property of the county of Suffolk or the people of the state of New\nYork.\n