Is anybody here a screenwriter or knowledgeable about screenwriting? A friend of mine says that he heard a screenwriter say in an interview that anybody who has ever written a screenplay based on a novel has to be given screen credit if a movie based on that novel ia made. It’s not clear if he was saying that (1) this means that anyone who did an earlier attempt at a screenplay that the final screenwriter looks at has to be given on-screen credit or that (2) anyone who’s done a screenplay based on the novel whatsoever has to be given on-screen credit, even if the final screenwriter never looks at the screenplay. Both interpretations sound wrong to me.
I think what’s actually true is that any author of an earlier screenplay has the right to force the producers to go to arbitration before the Writer’s Guild if he doesn’t like the awarding of credits, but tiny contributions (or no contribution at all) to the final screenplay don’t get you any on-screen credit.