N.Y. Real Prop. Tax Law § 208

§ 208. Official seal. The board shall have an official seal. Its\nrecords, proceedings and copies of all papers and documents in its\npossession and custody may be authenticated in the usual form, under\nsuch seal and the signature of any one of the members of the board or\nsuch officer or employee of the state board of real property tax\nservices as may be designated by the board, and shall be received in\nevidence in the same manner and with like effect as deeds regularly\nacknowledged or proven.\n