combination thereof, n ot having the character of an actual and personal correspondence. DAEaTS SECTION  1179 . Opening of First-Class Mail Matter . — When first-class mail matter is found to be undeliverable by reason of the insufficiency or inaccuracy of the address on the outside of the envelope or wrapper or by reason of the failure of the addressee  to call for the matter, if held subject to call, it may be opened at the dead-letter office of the Bureau of Posts by an employee of the Bureau thereunto duly authorized by the Director. A letter addressed to a person in the United States may likewise be  opened if deposited in the mail without the prepayment thereon of one full rate of postage. But matter with a sufficient return address, shall not be thus opened until returned to such address, with like inability to deliver the same to the sender, and a l etter bearing the card of a hotel, school, college or other public institution or office printed on the envelope, shall not be returned unless the card includes a printed or written request for return. The period during which undelivered letters shall rema in in any post office before being forwarded to the dead-letter office shall be prescribed by regulation. Save as provided in the preceding paragraph, no person other than the addressee or sender, or the duly authorized agent of such, shall open or break the seal of any envelope or wrapper containing mailable first-class matter; and nothing in this chapter con tained shall be deemed to authorize the opening of any such matter except as in this section provided. ADaSEH SECTION  1180 . Examination of Second and Third Class Mail Matter . — Any envelope, package, or wrapper containing matter of the second or third class may be examined at the office of mailing, and shall be charged with postage at the highest rate to which any  of the inclosed matter is subject, but nothing herein contained shall be so construed as to prohibit the insertion in periodicals of advertisements attached permanently to the same. cCaSHA SECTION  1181 . Absolutely Nonmailable Matter . — No matter belonging to any of the following classes, whether sealed as first-class matter or not, shall be imported into the Philippine Islands through the mails, or be deposited in or carried by the mails of  the Philippine Islands, or be delivered to its addressee by any officer or employee of the Bureau of Posts: ( a ) Written or printed matter in any form advertising, describing, or in any manner pertaining to, or conveying or purporting to convey any information concerning any lottery, gift enterprise or similar scheme depending in whole or in part upon lot or chance , or any scheme, device, or enterprise for obtaining any money or property of any kind by means of false or fraudulent pretenses, representations, or Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 352