Iowa Code § 249.6: Charge for cashing warrant unlawful.

It shall be unlawful for any person to charge a fee, service charge or exchange for the cashing of a warrant issued in payment of state supplementary assistance, or to discount or pay less than the face value of any warrant drawn in payment of such assistance, when cashing such a warrant or accepting it in payment of the purchase price of goods, services, rent, taxes or indebtedness.