Ulster Bank has faced yet more computer problems with some customers reporting difficulties with their accounts.
Some of the troubled bank's customers reported that cash machine withdrawals had been taken from their accounts twice.
It's understood the problems first began on Easter Monday.
The problem lasted for a 24 hour period during Monday and Tuesday of this week.
A spokesman for the bank said it was "working to correct this for affected customers and restore money to accounts tonight".
"Customers will not be left out of pocket as a result and can contact us if they require further assistance. We apologise for any inconvenience caused."
Computer woes have plagued the bank following a massive IT failure in 2012.
This week's problems for some bank customers comes around two years after widespread issues left hundreds of thousands of people without access to their money.
That IT debacle cost the bank tens of millions of pounds.
Later that year the financier revealed it set aside a provision of £82m to compensate the some 750,000 customers caught up in the IT failure.
In the wake of the glitch bank boss Jim Brown, defended a multi-million pound compensation package during the massive outage.
"It's just one of the measures and I do think it does recognise the inconvenience," he said.
Many of the bank's customers only received what the company described as a £20 "incident" credit - handed out to those who were forced to use their branches during the outage.
Towards the end of last year, customers also suffered more technical issues.
Customers reported payment and account problems in December, just days after thousands were left unable to access their online systems or use banks cards.
It's understood some customers were having difficulty due to a backlog in delayed payments going through the bank systems.
Earlier that month, customers were also unable to access their online systems or use banks during the busiest internet shopping day of the year.
The technology meltdown left customers of the Royal Bank of Scotland (RBS) Group, which includes NatWest and Ulster Bank, without the use of their debit or credit cards.
The outage came on the busiest online shopping day - termed Cyber Monday - which typically boasts the highest amount of online transactions during the year.