N.J. Stat. Ann. § 17:9A-219

Instruments for the payment of money may be indorsed and deposited to the credit of an account of cofiduciaries with a banking institution, and withdrawals may be made from such account by check or otherwise, by any one or more of such cofiduciaries who shall be authorized in writing by all the cofiduciaries to make such indorsements and deposits or withdrawals, unless the will or other instrument or the court order or decree under which such cofiduciaries are acting otherwise provides.