The Collaborative International Dictionary of English v.0.48:

Forger \For"ger\, n.[Cf. F. forgeur metal worker, L. fabricator
   artificer. See Forge, n. & v. t., and cf. Fabricator.]
   One who forges, makes, of forms; a fabricator; a falsifier.
   [1913 Webster]

   2. Especially: One guilty of forgery; one who makes or issues
      a counterfeit document.
      [1913 Webster]

WordNet (r) 3.0 (2006):

forger
    n 1: someone who operates a forge
    2: someone who makes copies illegally [syn: forger,
       counterfeiter]