Copyright infringement

An advertisement for copyright and patent preparation services from 1906, when copyright registration formalities were still required in the US

Copyright infringement (sometimes referred to as piracy) is the use of works protected by copyright without permission for usage where such permission is required, thereby infringing certain exclusive rights granted to the copyright holder, such as the right to reproduce, distribute, display or perform the protected work, or to produce derivative works. The copyright holder is usually the work's creator, or a publisher or other business to whom copyright has been assigned. Copyright holders routinely invoke legal and technological measures to prevent and penalize copyright infringement.

Copyright infringement disputes are usually resolved through direct negotiation, a notice and take down process, or litigation in civil court. Egregious or large-scale commercial infringement, especially when it involves counterfeiting, or the fraudulent imitation of a product or brand, is sometimes prosecuted via the criminal justice system.

Estimates of the actual economic impact of copyright infringement vary widely and depend on other factors. Nevertheless, copyright holders, industry representatives, and legislators have long characterized copyright infringement as piracy or theft – language which some US courts now regard as pejorative or otherwise contentious.