special delivery

special delivery
    n 1: mail that is delivered by a special carrier (for an
         additional charge)
    

29 Moby Thesaurus words for "special delivery":
      PP, RD, RFD, airmail, book post, correspondence, direct mail,
      direct-mail selling, express, fourth-class mail, frank,
      halfpenny post, junk mail, letter post, letters, mail,
      mail-order selling, mailing list, newspaper post, parcel post,
      post, post day, registered mail, rural delivery,
      rural free delivery, sea mail, seapost, special handling,
      surface mail