Cease and desist
Although cease and desist letters are not exclusively used for stopping copyright infringement, such letters are also used to protect other issues related to intellectual property. The holder of an intellectual property right (i.e. either a copyrighted work, a trademark, or a patent) may send the cease and desist letter to tell a third party (i.e. an individual or business who is not related to the holder of the intellectual property right) that they are infringing intellectual property. The letter may contain either an offer to license the intellectual property or a very clear threat of a lawsuit. A cease and desist letter often causes both parties to make licensing negotiations, and is very often the first step towards a lawsuit.