Postal Explorer > Publication 52 - Hazardous, Restricted, and Perishable Mail > 4 Restricted Matter > 48 Unsolicited Promotional Samples
The term “unsolicited promotional sample” refers to any article of merchandise that is sent through the mail free of charge and that is unrequested by the addressee. This definition includes items such as patent medicines, cosmetics, laundry products, and razors.