N.J. Stat. § 3B:3-5
A will executed in compliance with N.J.S. 3B:3-2 may at any time subsequent to its execution be made self-proved by the acknowledgment thereof by the testator and the affidavits of the witnesses, each made before an officer authorized pursuant to R.S. 46:14-6.1 to take acknowledgments and proofs of instruments entitled to be recorded under the laws of this State, attached or annexed to the will in substantially the following form:
The State of
County of
We,, and, the testator and the witnesses, respectively, whose names are signed to the attached or foregoing instrument, being duly sworn, do hereby declare to the undersigned authority that the testator signed and executed the instrument as his last will and that the testator had signed willingly (or willingly directed another to sign for the testator), and that he executed it as the testator's free and voluntary act for the purposes therein expressed, and that each of the witnesses, in the presence and hearing of the testator, signed the will as witness and that to the best of his knowledge the testator was at that time 18 years of age or older, of sound mind and under no constraint or undue influence.
Testator
Witness
Witness
Subscribed, sworn to and acknowledged before me by, the testator, and subscribed and sworn to before me by and, witnesses, this day of.
(Signed)
(Official capacity of officer)
N.J.S. § 3B:3-5