Former Irish Bank Resolution Corporation chairman Alan Dukes has said he was briefed by lawyers on some of the contents of taped conversations between Anglo Irish Bank executives.
Mr Dukes said it was not the job of public interest directors to review evidence which had to be passed to the Garda Síochána.
He said he had read transcripts of some conversations but had not heard the audio of the recordings until they were leaked to the media.
Responding to remarks by Tánaiste Eamon Gilmore and criticism from Sinn Féin, Mr Dukes stressed he had co-operated with every inquiry into the activities at the lender.
The former former Fine Gael leader and finance minister said the leaked recordings were a small part of the evidence which was handed to gardaí which included other documents and email traffic.
He also said he had given information to the Regling & Watson inquiry and to Finnish expert Peter Nyberg who produced a report for the government into Irish banking.
Mr Dukes added that Governor of the Central Bank Patrick Honohan, also had access to the minutes of IBRC's board meetings.
He said the public interest directors had appeared before Oireachtas hearings.
Mr Dukes added that he was "amused" at the accusation by Sinn Féin that he had been "singing dumb".
He was appointed as the State's public interest director to the board of Anglo and later became chairman of the IBRC which took over the defunct bank along with the Irish Nationwide Building Society before being liquidated.
The leaked tape-recordings of former Anglo bank executives provoked widespread public and international criticism.
The Irish Independent published transcripts of conversations from 2008 between managers at the bank.