N.J. Stat. Ann. § 17:33B-36

If an automobile insured for physical damage coverage by an insurer is damaged, the insurer may request that the automobile be made available for inspection regardless of whether the automobile is repaired. The results of the inspection may form a basis for determining the value of the automobile in the event of a subsequent loss. If the automobile is repaired, the insurer shall request the repair invoice and shall require the insured and the auto body repair facility or automobile repairer to certify, under the penalties of perjury, whether the applicable deductible has been paid to the auto body repair facility or automobile repairer, whether any repairs have been made and if any items allowed by the insurer were not included in the repairs.