counterfeiter

: made in imitation of a genuine article (as a document) without authorization and especially with intent to deceive or defraud

: to make an imitation of without authorization and especially with intent to deceive or defraud whoever falsely makes, alters, forges, or counterfeits any deed —U.S. Code

: something counterfeit all counterfeits of any coins or obligations —U.S. Code — compare forgery