N.J. Stat. § 40:37-225
The commission shall make and deliver to a purchaser at such sale, who shall have made payment, a certificate of sale, signed by its officers thereunto duly authorized, sealed with its seal and acknowledged or proved according to law. The certificate shall set forth as concisely as possible, the facts of the assessment, advertisement and sale, together with a short description of the real estate sold, the amount actually paid therefor by the purchaser and the length of time for which he shall have purchased the same. Every such certificate shall, before its delivery, be recorded in one of the books to be kept by the commission for that purpose. It may be assigned by deed of assignment under seal, duly acknowledged, and every such assignment may be recorded in the books of the commission upon the payment of a fee of one dollar.
N.J.S. § 40:37-225