4 Restricted Matter | Postal Explorer

4 Restricted Matter

41 General

411 Definition

Restricted matter is a designation of items that fall within one of three categories: mailable, mailable with restrictions, or prohibited. Restricted matter includes items on which mailing restrictions have been imposed, generally, by federal law. Examples include motor vehicle master keys and intoxicating liquors. Any advertising, promotional, or sales matter that solicits or induces the mailing of any nonmailable article within this publication is prohibited. Refer to the Domestic Mail Manual (DMM) 601.9.4.1.