Sarah Ferguson is being defended by a Turkish legal team but has declined to go to Ankara for the trial.
She is accused of violating the privacy of children during the filming for ITV.
The duchess has previously apologised for any offence, but says she stands by the 2008 documentary's conclusion that ill-treatment was taking place.
If found guilty, she could be sentenced to more than 20 years in prison.
BBC correspondent Jonathan Head says the duchess has made it clear she will not return to Turkey and British officials have insisted there is no possibility of her being extradited. » | Friday, May 04, 2012
