Bosses at AIB are to be called into the Oireachtas Finance Committee to face questions on debt write-downs.
It follows reports that former hurling star, DJ Carey, had a loan running into millions of euros written down by 99 per cent.
AIB's Chief Executive told staff yesterday that all of the facts of the case were not yet in the public domain.
Subsequent reports now suggest the bank also recovered and sold a number of properties.
In the Dáil, Taoiseach, Leo Varadkar, said he was reluctant to talk about any individual's finances.
"I imagine it's linked to how much the person is able to pay back rather than who they are.
"But that needs to be looked at, I think.
"I can't tell you how many have had write-downs of more than 90% or are not, but the Department of Finance may have those figures, I don't have them personally.
The issue was raised by Aontú leader, Peader Tóbín, who said it would be difficult for many to see if others were treated differently by the banks.
"Many people who will have experiences of mortgage distress themselves, whether they be an illness, or they have Mica homes which are mortgages on lumps of rubble, or their small businesses, [they] will have experienced these banks telling them that it's impossible to give write-downs to reduce the level of debt that they owe".