N.Y. Pers. Prop. Law § 47-c

§ 47-c. Refiling. The filing of assignments shall be valid for a\nperiod of two years only. The validity of the filing may in each case\nbe extended for successive additional periods of one year from the date\nof refiling by filing in the office of the county clerk of the county in\nwhich the original assignment or duly authenticated copy thereof was\nfiled a true copy of the original assignment within thirty days next\npreceding the expiration of each period, with a statement attached\nsigned and verified by or on behalf of the assignee, setting forth that\nthe assignment is in force and stating the amount remaining unpaid. Such\ncopy, with statement attached, shall be filed and entered in the same\nmanner as an assignment or copy thereof filed and entered for the first\ntime, and the filing officer shall be entitled to a like fee as upon the\noriginal filing.\n