Bank of Ireland has apologised after it discovered that financial details relating to a further 42,000 customer accounts were not reported correctly or at all to the Central Credit Register (CCR).
The errors may have impacted the willingness of the bank or other lenders to give loans or other forms of credit to the customers concerned.
The cases came to light after Bank of Ireland conducted a trawl following a €463,000 fine it received from the Data Protection Commission (DPC) last year for data breaches related to the CCR that affected more than 50,000 customers between November 2018 and June 2019.
"Following last year's inquiry by the Data Protection Commission into errors in information we submitted to the Central Credit Register, Bank of Ireland began a comprehensive review to identify other potential CCR errors," the bank said in a statement to RTÉ News.
"Our review identified a number of accounts for which credit or overdraft information had not been reported correctly to the CCR, and others for which the monthly reporting of credit information did not start or was interrupted, leaving a gap in the customers' CCR records," Bank of Ireland said.
The lender said it has already corrected the CCR record for around 30,500 of the impacted accounts and notified the customers concerned.
"We are currently working through the remaining accounts as a priority and will be writing to these customers as their CCR record is updated," it said.
"We sincerely apologise for this error and any inconvenience it has caused our customers," the bank added.
The errors happened at different times, dating back as far as 2017 when the CCR was first established and relate to a variety of different types of accounts and products.
It is understood that the Data Protection Commission has been contacted by the bank about the latest discoveries.
The CCR is a database that records whether borrowers have successfully met the terms of credit agreements by repaying on time and in full.
Credit agreements include loans, overdrafts, credit cards and mortgages.
The CCR is consulted by lenders who are deciding whether or not to lend money to people.
If an individual or organisation does not have a consistently good credit record, it can have a bearing on a lender's willingness to lend.
In April the bank admitted that an error meant that details of mortgages transferred to it from KBC Bank Ireland had not been submitted to the CCR for the previous two months.
