SECTION  2687 . Various Offenses of Employees of Bureau of Posts . — Officers or employees of the Bureau of Posts knowingly guilty of any of the delinquencies hereinbelow specified shall be punished by a fine of not more than three hundred pesos or by impriso nment for not more than six months, or both: CDAHIT ( a ) The selling of postage stamps, stamped envelopes or wrappers, or postal cards for a larger sum than the values indicated on their faces or fixed for them by regulation, or the making of any other disposition thereof contrary to law or regulation. ( b ) The receiving of an article for transmission by mail or the transmission thereof by mail when the postage thereon has not been paid. ( c ) The delivery of any article transmitted by mail, the postage thereon not having been paid. ( d ) The failure, upon delivery of any article transmitted by mail and upon which postage is still due, to affix and cancel the stamp required for such postage. ( e ) The receiving or carrying of mail otherwise than as allowed by law or regulation, by any person engaged in the carrying of mail or having a contract therefor. SECTION  2688 . Unlawful Use of Stamps and Stamped Envelopes . — Any person who shall use, or attempt to use, in payment of postage, any stamp or Government stamped envelope or wrapper which has been before used for a like purpose or has been canceled shall b e punished by a fine of not more than five hundred pesos, or by imprisonment for not more than one year, or both. SECTION  2689 . Unlawful Opening or Detention of Mail Matter . — Any person who shall unlawfully detain or open any mail matter which has been in any post office, or in or on any authorized depository for mail matter, or in charge of any person employed in th e Bureau of Posts; or who shall secrete or destroy any such mail matter, or shall unlawfully take any mail matter out of any post office, or from any person employed in the Bureau of Posts, before it is given into the actual possession of the person to who m it is addressed, or his duly authorized agent, shall be punished by a fine of not more than one thousand pesos or by imprisonment for not more than one year, or both. SECTION  2690 . Miscellaneous Offenses Connected with Postal Service. —  Any person guilty of any delinquency hereinbelow specified or who falls within Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 860