The purchaser or the owner for the time being of tax certificates of sale of such several parcels or lots shall duly execute and acknowledge, in the manner now required in the case of a deed, releases of each and every parcel or lot, which has been redeemed through the county treasurer's office or directly with the purchaser or owner for the time being of such tax certificates. Such releases shall be filed in the office of the county treasurer.
N.Y. Suffolk County Tax Act § 50