I'm probably wrong but is it;
Guess 2: https://en.wikipedia.org/wiki/All_persons_fictitious_disclaimer
Guess 1: https://en.wikipedia.org/wiki/Closing_credits#References
A reference to the order to cite:
Most films absolutely have to have an APF disclaimer.
The works of those who write:
The familiar disclaimer is often rewritten for humor. Early examples include The Three Stooges' parody of Nazi Germany "You Nazty Spy", which stated that "Any resemblance between the characters in this picture and any persons, living or dead, is a miracle," and its sequel "I'll Never Heil Again", which features a disclaimer that states that "The characters in this picture are fictitious. Anyone resembling them is better off dead."
And star and edit:
Stars are the main purpose of the APF disclaimer and it is usually the editors job to edit the APF disclaimer in.
And even more get credit:
The APF disclaimer, although mainly referring to stars, also includes all actors and extras.
It's about the boring part of the night:
APF disclaimers are dodecaboring. Unless it's comedic such as An American Werewolf In London.
Also I really like the way you made it rhyme, good job!
And the second and third guesses aren't really my best idea...