Nowadays we often hear and read about copyright infringements. That is why you probably sometimes wonder if running around in Lord Vader's outfit, when Lucasfilm is suing everyone for everything, is safe. Usually big companies do not attack participants of conventions, but does it mean we have nothing to worry about? It turns out that it is not so simple. We will talk about, when and who was sued for costumes from "Star Wars", why creators of Pokemon threatened the organizers of the cosplay party, and also, can you create costumes for others?