Ansett had a pilot caught out with fake docs in the 90's.
He failed his RAAF pilots course and then faked tons of Macchi hours in his logbook and eventually got accepted by Ansett.
He was caught out after current airline pilots, who were on his RAAF course, saw him in Ansett uniform and reported his history to them.
Bye-bye was the end result, and a few years before Ansett said bye-bye too.