A copy that is represented as the original

Criminal falsification by making or altering an instrument with intent to defraud

Art forgery is the creation and sale of works of art which are falsely credited to other, usually more famous artists.

A willful perversion of facts

Forgery is an album by the American alternative rock band Monks of Doom, released in 1992.

In a cryptographic digital signature or MAC system, digital signature forgery is the ability to create a pair consisting of a message, m {\displaystyle m}, and a signature, σ {\displaystyle \sigma }, that is valid for m {\displaystyle m}, but has not been created in the past by the legitimate signer.