AIB may have given poor credit ratings to up to 12,000 customers

Up to 12,000 AIB customers may have been given a poor credit rating because the bank over-reported the level of missed payments.

The bank’s mistake continued for six years before two eagle-eyed customers alerted the bank.

If a customer misses a repayment it is red-flagged by the bank to the Irish Credit Bureau (ICB). However, in thousands of cases the bank was miscalculating the volume of missed payments by up to four times.