IBRC has filed documentation to commence legal action against the former boss of Irish Nationwide Michael Fingleton and five former senior figures from the building society.
The five are former chairman Michael Walsh, and former directors Terence J Cooney, David Brophy, Cornelius P Power and John S Purcell.
The two plenary summonses were filed in the High Court Office today.
The first relates to Mr Fingleton, while the second relates to the five former directors.
By filing the summons now, Irish Banking Resolution Corporation will be able to take legal action against Mr Fingleton and others in due course and will not run out of time under the statute of limitations.
It is understood that the issues involved could go back to 2006.
The move follows a probe into Irish Nationwide carried out some years ago by Ernst and Young and McCann Fitzgerald.
IBRC had been asked to examine the result of that investigation, which had been passed on to the Minister for Finance and the Financial Regulator.
Sources described today's summonses as "protective" - to avoid running out of time to take legal action against the former Irish Nationwide personnel.
It is speculated the legal action could be in relation to alleged breach of contract, breach of fiduciary and breach of duty of care.
