Former Esat boss Denis O'Brien is expected back at the witness stand at the Moriarty Tribunal later today.
Mr O'Brien failed to attend the inquiry on two previous occasions after his wife gave birth to the couple's second child in London.
He requested a break from testifying to carry out his parental responsibilities.
It is believed that lawyers for the tribunal will question Mr O'Brien on his movements during the last two weeks.
Newspaper reports claim that his private jet made a number of journeys into Dublin during the past fortnight, but it is not known if the millionaire businessman was on board.