I was served with a summons for a civil action in regard to copyright infringement for illegally downloading a movie. My IP address was named specifically, however, I have never downloaded any movies or music from online. I am expected to answer the complaint as well as file my answer with the court. I'm wondering what format I need to use to respond? Is this as simple as writing a letter denying the claims in the papers and submitting it to the plaintiff's attorney? I really don't want to retain an attorney for this, but I want to make sure that I am not held liable for something I did not do.