Ind. Code § 24-4-2-4

Sec. 4. The redeemable value of such stamps, trading stamps, cash discount stamp, check, ticket, coupon or other similar device, printed or legibly written on the face of said stamp as provided in this section shall be the same, whether redeemed in merchandise or in lawful money of the United States, and the redemption of such stamps as described in this section shall be in lawful money of the United States or in merchandise of equal value thereto, at the option of the holder of said stamps.