The trial of Saddam Hussein was so flawed that its verdict is unsound, the advocacy group Human Rights Watch says.
The former Iraqi leader was sentenced to death on 5 November after being convicted of crimes against humanity.
But HRW said it had documented "serious administrative, procedural and substantive legal defects" that meant he did not get a fair trial.
Saddam Hussein has two more weeks to lodge an appeal - but his lawyer claims he has been blocked from doing so.
Chief defence lawyer Khalil al-Dulaimi told the BBC his team had been prevented from filing the necessary papers.
The old bastard is lucky we didn't lynch him. Just drop him in the middle of the Kurds and see what'll happen...