Alan Smithee (also Allen Smithee) is an official pseudonym used by film directors who wish to disown a project. Coined in 1968 and used until it was formally discontinued in 2000, it was the sole pseudonym used by members of the Directors Guild of America (DGA) when directors, dissatisfied with the final product, proved to the satisfaction of a guild panel that they had not been able to exercise creative control over a film. The director was also required by guild rules not to discuss the circumstances leading to the movie or even to acknowledge being the project's director. History.
https://en.wikipedia.org/wiki/Alan_Smithee