If you have ever celebrated your birthday at a restaurant, you’ve probably wondered why restaurant staff use their own, in-house birthday song rather than the standard “Happy Birthday to You” used in private settings. This is because the song “Happy Birthday to You” was covered by a copyright (until 2016, at least), and a public performance of it could expose the singers to copyright infringement suits. This scenario illustrates the general principle that the unauthorized use of copyrighted work constitutes infringement. However, not all unauthorized use of copyrighted works will subject the user to an infringement lawsuit. If you have been accused of copyright infringement, an Alabama IP litigation attorney can help you defend yourself.