superscribe
    v 1: write on the top or outside; "superscribe one's name and
         address"
    2: write on the outside or upper part of; "superscribe an
       envelope"

Superscribe \Su`per*scribe"\, v. t. [imp. & p. p.
   Superscribed; p. pr. & vb. n. Superscribing.] [L.
   superscribere, superscriptum; super over + scribere to write.
   See Super-, and Scribe.]
   To write or engrave (a name, address, inscription, or the
   like) on the top or surface; to write a name, address, or the
   like, on the outside or cover of (anything); as, to
   superscribe a letter.
   [1913 Webster]