N.J. Admin. Code § 12:21-1.4
If benefits have been paid in error to a claimant by one program (either the State plan, family leave insurance benefits during unemployment, or a private plan) for a period of family leave and the claimant is correctly entitled to benefits under another program (either the State plan, family leave insurance benefits during unemployment, or a private plan) for that same period of family leave, the Division may arrange for a reimbursement of funds between the two programs. If it is determined that the benefits were received as a result of the claimant's making a false statement knowing it to be false or knowingly failing to disclose a material fact, the individual shall be subject to a fine and repayment of the overpaid amount under the provisions of 43:21-55(a).
N.J. Admin. Code § 12:21-1.4