N.J. Stat. § 22A:4-20
Whenever any surrogate, register of deeds and mortgages, county clerk or sheriff shall be requested by the State or any of its agencies to file any paper, enter and docket any writ, order or judgment, record any paper, make a copy or search or perform any other service in their respective offices for which costs, fees or compensation is allowed, such surrogate, register of deeds and mortgages, county clerk or sheriff shall forthwith file or record such paper or perform the service requested without exacting payment in advance of the lawful fees incident to such filing, recording or service, but such officer shall render to the State, or the agency thereof making such request, a monthly statement of all such fees due and payable to him. No surrogate, register of deeds and mortgages, county clerk or sheriff shall become personally liable to his county for the payment of such fees and costs until the same shall have been actually paid to him.
N.J.S. § 22A:4-20