N.J. Stat. § 19:62-11: Criteria for a ballot to be counted.

11. If received in a timely manner, a ballot shall be counted only if:

a. the ballot is returned in the inner envelope and the inner envelope is enclosed in the outer envelope;

b. the envelopes in which it is returned manifest no signs of tampering or improper handling;

c. the outer envelope is signed by the registered voter to whom the ballot has been issued; and

d. the signature is verified as provided in subsection c. of section 3 of this act, P.L.2005, c.148 (C.19:62-3).

L.2005,c.148,s.11.