Courtesy of Stacy Conradt, here are some stories of "non-existent" writers who received credit for scripts they didn't actually scribble. In each case, the works earned Oscar nominations, so that was some epic scribbling. In some cases, as in Woody Allen's The Front, the real author was blacklisted and couldn't get work under his real name. In some he didn't want credit in his own name. What is authorship, anyway?
This article was published in Mental Floss. (I just love that magazine).