New Jersey Statutes Title 54. Taxation 54 § 5-31

At the time and place specified in the notice of sale, or adjournment, the collector shall sell at public auction each parcel of real property which has been so advertised, upon which the municipal liens remain unpaid, unless an error is found requiring readvertisement. The sale shall be made for the amount for which the parcel was advertised, unless that amount is found to be in excess of the correct amount, and then for the correct amount together with the interest thereon unless such interest has already been included in the notice of sale and the costs of sale.