This is what I think has happened. There is no conspiracy. It is just incompetence or a mistake.
1) In calculating the repayment AIB used some wrong data - looks like the wrong maturity date as Red explains.
2) They sent out the letters
3) They first heard about it when people started ringing.
4) They should have said "That is odd - we will investigate it" and then said that to everyone else who rang.
5) But instead, they said "Ulster Bank must have been wrong".
Don't assume a huge technical competence in AIB. On the Prevailing Rate case, they insisted that they were paying compound interest on the compensation and I was so gobsmacked that I could not get it across to them that they were not. Then when they realised that they were not, they said that simple interest was in line with the Ombudsman's decision.
The transfer of these mortgages is a huge operation.
The guys who knew how to do things were probably on holidays or working from home.
Brendan
Brendan, the wrong date would impact every single mortgage. People change repayment days to different day to maturity date all the time. Very few mortgages will actually match for last repayment date and legal maturity date.
AIB are saying this only impacts mortgages maturing over next couple of months or where people have paid extra off their mortgage. Again doesn't make sense why only these mortgages used 'wrong data'.
The letters were sent out with increases to monthly repayments that went beyond the 25bps ECB rate change. This would have flagged in AIB. A system change would have been needed for that. Repayments don't just change without being flagged. AIB would have seen that people's repayments were changing or there was an issue with stub periods at the end of mortgages. Its a basic integrity check carried out every single night during batches.
When people rang up, they were immediately told this was related to Ulster Bank. Not days later but straight away. They were reasy for the question. Before a response like that is given out by customer service staff, it would have investigated and signed off by very senior people in AIB.
People have been ringing AIB since the end of July when these letters were sent and nothing but silence. It took one article in the Independent and within hours, AIB come out saying it was all a mistake. It wasn't a mistake. The central bank were informed of this issue well before yesterday.
There is an issue. And it doesn't matter if fault lies with Ulster Bank, AIB or is an issue around data migration. AIB are obviously now going to take the cost but that wasn't their initial thought process.
AIB knew what they doing when they sent their letters. If that hadn't been publicised yesterday, there would still be no statement from AIB.