18 U.S.C. § 1302 : US Code - Section 1302: Mailing lottery tickets or related matter

      Whoever knowingly deposits in the mail, or sends or delivers by
    mail:
      Any letter, package, postal card, or circular concerning any
    lottery, gift enterprise, or similar scheme offering prizes
    dependent in whole or in part upon lot or chance;
      Any lottery ticket or part thereof, or paper, certificate, or
    instrument purporting to be or to represent a ticket, chance,
    share, or interest in or dependent upon the event of a lottery,
    gift enterprise, or similar scheme offering prizes dependent in
    whole or in part upon lot or chance;
      Any check, draft, bill, money, postal note, or money order, for
    the purchase of any ticket or part thereof, or of any share or
    chance in any such lottery, gift enterprise, or scheme;
      Any newspaper, circular, pamphlet, or publication of any kind
    containing any advertisement of any lottery, gift enterprise, or
    scheme of any kind offering prizes dependent in whole or in part
    upon lot or chance, or containing any list of the prizes drawn or
    awarded by means of any such lottery, gift enterprise, or scheme,
    whether said list contains any part or all of such prizes;
      Any article described in section 1953 of this title - 
      Shall be fined under this title or imprisoned not more than two
    years, or both; and for any subsequent offense shall be imprisoned
    not more than five years.