He has (had) some pilot licenses, but not the appropriate commercial license. Somehow he obtained an imitation of the official license papers... (crafted one himself?)
So far it seems a case of "capable but not qualified", but I have seen no proof of his capacities.
Edit: there were two flights to Ankara on 2/3: TK 1958 and CAI 0202; I don't know which of the two flights was involved.