The Collaborative International Dictionary of English v.0.48:

Certificate \Cer*tif"i*cate\, v. t. [imp. & p. p.
   Certificated; p. pr. & vb. n. Certificating.] [See
   Certify.]
   [1913 Webster]
   1. To verify or vouch for by certificate.
      [1913 Webster]

   2. To furnish with a certificate; as, to certificate the
      captain of a vessel; a certificated teacher.
      [1913 Webster]