France's top civil court has ruled that Rwandan genocide suspect Félicien Kabuga can be handed over to a United Nations tribunal in Tanzania for trial.
Mr Kabuga was arrested in May at his home outside Paris after 26 years on the run.
Once one of Rwanda's richest men, Mr Kabuga is accused of financing the 1994 genocide.
He is alleged to have backed and armed ethnic Hutu militias who slaughtered about 800,000 ethnic Tutsis and moderate Hutus.
He set up the notorious Radio Télévision Libre des Mille Collines (RTLM), a Rwandan broadcaster that actively encouraged people to search out and kill ethnic Tutsis.
In 1997 he was indicted by the International Criminal Tribunal for Rwanda (ICTR), based in the northern Tanzanian town of Arusha, on seven counts including genocide and crimes against humanity.
He denies all the charges, describing the accusations as "lies" during a court appearance in May.