New Jersey Statutes Title 18A. Education 18A § 24-41

a. The notice of sale shall require all bidders to deposit a certified or cashier's or treasurer's check for 2% of the amount of bonds, drawn upon a bank or trust company for said amount, partially to secure the school district from any loss resulting from the failure of the bidder to comply with the terms of his bid, or as liquidated damages for such failure.

b. The State Board of Education, in consultation with the Local Finance Board in the Department of Community Affairs, may adopt rules and regulations in accordance with the “Administrative Procedure Act,” P.L.1968, c. 410 (C.52:14B-1 et seq.), to permit school districts to accept a financial surety bond in lieu of a certified, cashier's or treasurer's check as required in subsection a. of this section.