N.J. Stat. § 48:3-37: Redemption of unused tickets

The owner or person operating any railroad, steamboat or other public conveyance shall redeem at his general office the whole or such parts of coupons of any ticket sold as the purchaser has not used, at a rate equal to the difference between the price paid for the whole ticket and the cost of a ticket between the points for which the portion of the ticket was actually used.