Michael Lynn's lawyers say he's instructed them to file an appeal immediately against his conviction and sentence.
The former Wicklow solicitor's legal representatives say he also wants the Oireachtas to set up a tribunal of inquiry into banking in Ireland.
Michael Lynn was yesterday jailed for five-and-a-half years for stealing over €18m from financial institutions in 2006 and 2007.
The court heard he took out multiple mortgages on the same properties from different financial institutions.
Lynn claimed the banks knew he was taking out multiple mortgages on the same properties.
He said it was common practice during the Celtic Tiger years.
The jury at his retrial convicted him on ten of the charges, and the rest were dropped today.
Judge Martin Nolan set a sentence of thirteen years but gave him credit for the years he spent in a Brazilian prison.