Alternates names in unfinished films

Hi, I corrected info of two films that were unfinished films and never released including the same person (one of them I think that even never existed), but were rejected for being "unable to verify". In both, he figures as credited with his birth name (in one of them as a writer and in the other as a director), but if never were released because even weren't finished, how do you know that he's credited with an alternate name? 250616-102952-089000 250616-102229-603000