Media Mail packages may not contain advertising. Comic books do not meet this standard. Books may contain incidental announcements of other books and sound recordings may contain incidental announcements of other sound recordings. In accordance with standards in the Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM), Section 170, Media Mail packages must have a delivery address and the sender’s return address and are subject to inspection by the Postal Service™. Upon such inspection, matter not eligible for the Media Mail rate may be assessed at the proper price and sent to the recipient postage due, or the sender may be contacted for additional postage.
