Taoiseach Enda Kenny has declined to say whether using the "army" was ever specifically mentioned as a means of protecting banks during the financial crisis.
Mr Kenny is under pressure to account for comments he made in Madrid last week - in which he said he was told by the Central Bank's Governor that soldiers may be needed to guard banks and ATMs.
Sinn Féin said that the Taoiseach has been caught out in a "tall tale" - and it will challenge him on the issue when the Dáil returns.
It's that time of the night. Enda's fairy tales will lull me to zzzzzzzzxoxzzz— Gerry Adams (@GerryAdamsSF) October 28, 2015
When asked whether the army was ever mentioned, Mr Kenny said "security" matters were discussed, but only in the context of a potential Eurozone breakup.
"The issue of security, in terms of banks, if the currency was to collapse, what would you do, would you use a draft currency, would you have a reversion to another Irish currency or whatever - clearly that was a matter of very major importance, not just for Ireland but for other countries,
"All of the issues surrounding security on banks was raised as part of that general discussion."