I am writing a screenplay and would like to copyright it so that my idea is not stolen out from under me.
I’m a professional screenwriter, with produced TV and Film credits.
Worrying about idea theft is the mark of a beginning writer. Nobody is going to steal your idea. It’s too costly in the long run to do so and if you do submit to a production studio, you will sign a release form, which will wipe out all of your claims to the idea anyway. And besides, five other guys are working on it right now as well. The zeitgeist is alive and well believe me.
Mailing it back to yourself is not a form of copyright. It’s called, "The poor man’s copyright," and it’s worthless to the point of basically being an urban myth.
Now for the funny part.
You can register your script at the WGA West office. You can do this online, it used to be $25 it may now be $30. Why don’t I know? Because the production company I’m working with files the papers and pays the fee on my behalf. Same goes for the copyright. I sell them my script and they end up paying for the copyright, which they then buy from me anyway because it’s part of the sale agreement.
But you’re just starting out, so it’ll be $35 for an online copyright registration at the link below. I’m also including the link for the WGA registration.
That being said, a good number of production companies will not look at your script without a WGA registration number. My recommendation would be to register the script with the WGA but not secure the copyright (because that’s what you’re doing with the WGA anyway). Then if you manage to option your work, you have them purchase the copyright in your name. Which saves you $35.
The only reason I don’t have to deal with this stuff is because I’m usually hired from a pitch, what we do in that instance is register the Treatment or scriptment to give us a paper trail for the money folk.
Hope this helps.