Files leaked to the Sunday Times, which are also in the possession of the gardai, also allege that Brian Lenihan, the finance minister, feared for his job after admitting in the Dail in February 2009 that it took him three months before he read a report that was written in October 2008 about the transaction between IL&P and Anglo.
Lenihan allegedly told Gillian Bowler, the IL&P chairman, that she should not resign following the disclosure of the arrangement between the two banks because he wanted her to stay around to help politically.
A statement from Denis Casey, the former chief executive of IL&P, claims that Bowler told him this on February 12, 2009 - after he was asked to leave a meeting while Lenihan held a "one to one" meeting with his chairwoman.
Casey claims Bowler told him after the meeting that Lenihan had said he might need both Ray McSharry, another member of the IL&P board, and her to "put in a good word" for him with Brian Cowen, the taoiseach.
Casey has given the gardai a note of the conversation that he claims to have had with Bowler immediately after the meeting.
A spokesman for Lenihan described the allegation as "utter rubbish" but admitted the meeting took place. A spokesman for Bowler told the Sunday Times it would be inappropriate to comment.
The allegations are contained in a new statement which was provided by Casey to the gardai.