N.J. Stat. § 48:2-29.4: Repayment of excess surcharge

Whenever after hearing upon notice the board shall determine that any public utility has collected by means of a surcharge an amount of money exceeding the authorized amount or has continued to collect a surcharge after the specified purpose for which it was authorized has been accomplished, the board may require such public utility by an order in writing to repay the excess so collected to those from whom the same was collected.