Former solicitor Michael Lynn has appeared in a court in Brazil in relation to an extradition application lodged by the Irish authorities.
The 43-year-old appeared at the Federal Court in Recife.
Mr Lynn, who has lived in Brazil since 2008, fled Ireland over five years ago owing over €80m to at least ten financial institutions.
A warrant was issued for his arrest after he failed to turn up in the High Court.
The Director of Public Prosecutions has directed that Mr Lynn face criminal charges.
While Ireland does not have a formal extradition treaty with Brazil, there is a bilateral agreement in place under which Ireland can apply to have Mr Lynn returned to Ireland.
Members of the media were not allowed into the court in Recife.
It is not known how long it will be before a decision is handed down.
Mr Lynn was arrested in Pernambuco in the northeast of Brazil in August.
He was granted permanent residency in Brazil two years ago following the birth of his son there.
The Law Society said Mr Lynn had been struck off in 2008 and was fined €2m, which it said remains unpaid.