Dublin Port Company chairman Joe Burke said the money in three different accounts came from fundraising but admitted there is no documentation to back this up.
Mr Burke said the so-called BT account was set up raise money for the upkeep of St Luke's; over £80,000 was lodged in it.
He admitted that there was no documentation to show the origin of the donations including two golf outings held in 1992 and 1995 said to have raised a total of £29,000.
And he accepted that a total of more than £60,000 was taken out of the account but none of it went on the St Luke's building.
Mr Burke said he was given £20,000 cash to arrange renovations for St Luke's in 1994 but repaid it in cash, possibly in sterling, when it was decided not to go ahead with it.
Another trustee, Tim Collins, was the signature on the account he has told the tribunal he cannot remember lodging sterling as records suggest.
Mr Burke said he was told about the loan from the BT account to Celia Larkin in 1993 to buy a house for her aunts.
He said he thought there was a legal document drawn up by solicitor the late Gerry Brennan but did not check this, and has since learned there is no documentation
He did not discuss it with her then partner Bertie Ahern.
He said the nearly £23,000 used to set up the so called CODR in January 1988 was left over from money held in another AIB Drumcondra account and used purchase St Luke's.
Mr Burke said the bank must have mislaid the documentation in relation to this other account.
Ex treasurer unaware of funds
Earlier at the tribunal, the former treasurer of Bertie Ahern's constituency said he was unaware that many thousands of pounds were being held in accounts connected to organisation.
But Liam Cooper, now chairman of the former Taoiseach's O'Donovan Rossa Cumann, said the money was held by trustees of St Luke's and he had no causes for concern.
Mr Cooper said the accounts he was aware of were the official O'Donovan Rossa and Comhairle Dáil Ceanntar accounts, which only contained a couple of hundred pounds.
They were mainly used to pay affiliation fees and for presentations.
Mr Cooper said he was unaware that there were many thousands of pounds in other accounts known as the CODR, BT and Number One constituency accounts, controlled by St Luke's trustees.
Mr Cooper was treasurer of the Comhairle Dáil Ceanntar from 1994 to 2001, but said there was little interest 'from the floor' about these accounts during AGMs or monthly meetings.
He said these matters were dealt with casually.
He could not explain why there was no reference to any of these accounts in constituency minutes until this year.
Mr Cooper also could not explain why 24 people were asked to contribute to the £56,000 cost of buying St Luke's when the old office in Amiens Street was sold for the exact same sum.
