Crazy credits for
The Godfather (1972) More at IMDbPro »

• Although Mario Puzo is given possessory credit at the beginning, and is
  credited as a screenwriter at the end, no credit is given to him on-screen
  as author of the original novel, even though that credit is given on the
  poster. This credit does appear in the second film, however.
• In the end credits, Marlon Brando's name is the only one that is not accompanied by the character name that he plays (e.g. "as Vito Corleone").
• Other than Mario Puzo's name there are no opening credits.

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