In the course of its work, the Investigation Branch of the Revenue Commissioners stumbled across a number of bogus non-resident accounts in the late 1980s and early 1990s.
In one case, it collected more than £2 million in Miltown Malbay after uncovering a number of such accounts in the Bank of Ireland branch of the west Clare town. Other branches where bogus non-resident accounts came to light in the period after 1986 included AIB branches in Temple more, Skerries, Stillorgan and Castlebar.
In Kilrush, a case involving an individual taxpayer led to the discovery of a further 20 undisclosed accounts at the AIB branch, one of which was a bogus non-resident account which had more than £80,000 on deposit at one stage.
Similar accounts were found in Bank of Ireland in Roscrea, National Irish Bank in Artane and on O'Connell Street in Dublin and Ansbacher Bankers Limited.
The report points to the lack of follow-up by the Revenue in a number of instances, including AIB cases in Skerries and Templemore.
In the report, the Revenue ascribes its lack of follow-up to a combination of factors including its lack of powers in relation to financial institutions, the primary responsibility on AIB to respond to the issues raised and a lack of awareness within Revenue of the scale of the problem.