Idaho Code § 28-2-329

No person, firm, partnership, association or corporation, or agent or employee thereof, shall, in any manner, or by any means, offer for sale goods, wares, or merchandise, where the offer includes the voluntary and unsolicited sending of goods, wares, or merchandise not actually ordered or requested by the recipient, either orally or in writing. The receipt of any such unsolicited goods, wares, or merchandise shall for all purposes be deemed an unconditional gift to the recipient who may use or dispose of the same in any manner he sees fit without any obligation on his part to the sender.