Brazil’s Supreme Court has ruled that the extradition of former solicitor Michael Lynn to Ireland can go ahead as planned.
Mr Lynn, who fled Ireland in 2007, faces charges relating to his property dealings.
It is alleged he owes up to €80 million to ten financial institutions.
Mr Lynn failed to attend a hearing at the High Court in Dublin in 2007.
He arrived in Brazil in 2012, where he lived in a villa near a beach while teaching English to locals, joined a country club and also worked in the property market.
Brazilian federal police arrested him in August 2013.
He had been fighting extradition to Ireland ever since.
Brazil's Supreme Court first ruled that Mr Lynn should be extradited in December 2014, but the process was delayed when he exercised his right to seek a clarification from the court.
In February this year it cleared the way for his extradition after presiding judge Marco Aurélio dismissed Mr Lynn’s final request to seek "clarification" of the original decision - a request on a technicality that was almost certain to fail - on all major points.
The other judges on the panel all endorsed his decision.
The Supreme Court in Brasilia today rejected for a second time an attempt by Mr Lynn's lawyers to "request clarification" of the original ruling.
The petition had no chance of changing the substance of the judgment, but has delayed his extradition by months.
The justice ministry can now organise for Mr Lynn's return to Ireland.
The delay in today's final judgment was because of a huge backlog of cases at Brazil's highest court, which deals with 50,000 cases a year.
The original judgment was made on 16 December 2014, but was not published until 26 February 2015.
It was first appealed on 4 March, with the outcome delayed for nearly a year. This second request for clarification also took nearly six months to reach court.
