BRENDAN Howlin has heaped pressure on Department of Finance officials to locate missing documents which relate to the banking crisis.
The Public Expenditure Minister said the Government was "absolutely anxious that every shred of documentation" was made available.
The two letters sent to the then finance minister are original versions that related to a proposed major investment in Bank of Ireland in 2009. They were copied to Mr Lenihan at the time but are now deemed missing.
The correspondence was between the then-governor of the Bank of Ireland Richard Burrows and Noel Corcoran, an adviser to the Jupiter Group, which had been interested in buying the bank at the time and had been among eight documents previously released under Freedom of Information in 2009.
The two letters that are now missing were completely redacted in a release to Sinn Fein's finance spokesperson Pearse Doherty.
Finance Minister Noonan now is facing calls to make a statement to the Dail in relation to the documents.
However, the Department stated that it had procedures relating to record management which were "regularly reviewed and updated".
"However, we rely on the users complying with the controls embedded in the system," the spokesman added.