Iowa Code § 123.116: Right to receive alcoholic liquor, wine, or beer.

The consignee of alcoholic liquor, wine, or beer shall, on demand of the carrier transporting such alcoholic liquor, wine, or beer, furnish the carrier, at the place of delivery, with legal proof of the consignee’s legal right to receive such alcoholic liquor, wine, or beer at the time of delivery, and until such proof is furnished the carrier shall be under no legal obligation to make delivery nor be liable for failure to deliver.