Former solicitor Michael Lynn has been remanded in custody following a court appearance in Dublin yesterday evening.
He was extradited from Brazil and arrived at Dublin Airport yesterday afternoon.
The 49 year old Crossmolina native appeared before Dublin District Court where he was charged with the theft of just under 30 million euro.
Mr Lynn is facing 21 charges under the theft and fraud offences act relating to alleged offences in 2006 and 2007.
He applied for bail, but Gardaí objected due to the seriousness of the charges and their belief that he was a flight risk.
After considering the issue, Judge Jones refused bail and remanded Mr Lynn in custody.
The judge said he was satisfied that Mr Lynn had no outstanding bench warrants and was entitled to the presumption of innocence, but also said he considered him to be a flight risk and therefore could not grant bail.
Mr Lynn was served with the book of evidence and will appear at Dublin Circuit Criminal Court on March 23.