The AIB has refused to comment on claims by a former senior executive who said he was invited by the bank to join an illegal offshore investment scheme.
Roy Douglas was one of five AIB executives who invested in the British Virgin Islands company Faldor Ltd.
The bank admitted last week that the executives had breached tax law by investing in the scheme, but Mr Douglas has said he was invited to join the scheme when he became an AIB executive.
He said he believed the scheme was legitimate.