forgery

n. counterfeit, falsification, fake, imitation

Forgery is the process of making or adapting objects or documents (see false document), with the intent to deceive. The similar crime of fraud is the crime of deceiving another, including through the use of objects obtained through forgery. Copies, studio replicas, and reproductions are not considered forgeries, though they may later become forgeries through knowing and willful mis-attributions.
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Noun
1. a copy that is represented as the original
(synonym) imitation, counterfeit
(hypernym) copy
(hyponym) fake, sham, postiche
(derivation) forge, fake, counterfeit
2. criminal falsification by making or altering an instrument with intent to defraud
(hypernym) falsification, falsehood
(derivation) forge, fake, counterfeit

(n.)
The act of forging, fabricating, or producing falsely; esp., the crime of fraudulently making or altering a writing or signature purporting to be made by another; the false making or material alteration of or addition to a written instrument for the purpose of deceit and fraud; as, the forgery of a bond.
  

(n.)
The act of forging metal into shape.
  

(n.)
That which is forged, fabricated, falsely devised, or counterfeited.
  

an illegal modification or reproduction of an instrument, document, signature, or legal tender.