The TD behind allegations that Denis O'Brien paid a lower rate of interest to IBRC says she stands by her sources.
Catherine Murphy says she has no fears about what the Commission of Investigation into the bank might uncover, saying: "I know what I know".
Deputy Murphy is one of three opposition TDs due to meet with the Finance Minister Michael Noonan this afternoon to discuss the terms of reference for the inquiry.
Denis O'Brien's spokesman says Deputy Murphy has never stood over the truth of her comments, but today Deputy Murphy says she has tested the information coming from her sources.
She said: "I have many sources and they can't all be wrong and I have tested the veracity of the sources that have come to me.
"I have no concern if this inquiry is as robust as it is setting out to be. I have no concerns about the findings that the inquiry will ultimately find."