N.J. Stat. § 30:4C-23
In addition to the methods otherwise provided in this article for establishing guardianship by the Division of Child Protection and Permanency, and when necessary to carry out the provisions of P.L. 1951, c.138 (C.30:4C-1 et seq.), the Division of Child Protection and Permanency, after due investigation and consideration, may, in cases where it would be to the permanent advantage of the child, take voluntary surrenders and releases of custody and consents to adoption from the parent, parents, guardians, or other persons or agencies having the right or authority to give such surrenders, releases, or consents. Such surrenders, releases, or consents, when properly acknowledged before a person authorized to take acknowledgments of proofs in the State of New Jersey, shall be valid and binding irrespective of the age of the person giving the same, and shall be irrevocable except at the discretion of the Division of Child Protection and Permanency or upon order of a court of competent jurisdiction.
N.J.S. § 30:4C-23