If you want to sell your screenplay, you have to pitch it. Register your script’s copyright with the Library of Congress in Washington, D.C., and then go out and pitch it. Nobody is going to “steal your idea”.f you are a gifted screenwriter who is willing to work hard to sell your script, you have a tremendous advantage over other writers who are trying to break in. Polite persistence, emotional intelligence in how you approach people, and a high tolerance for “rejections” or non-replies, also help.