How to identify fake professor?

Simple. If he couldn't teach even the simplest of lessons in the subject, or it's obvious that he's incapable of teaching the subject, then he's probably fake. Another thing, if he really studied in the University of Adelaide, try asking who his mentors were, or make him cite 5 or more places there whichever are his favorite hangouts (if you don't have background about University of Adelaide, try researching in their site before asking the questions)!