Published Monday, 29 October 2012
A general view of the Ulster bank headquarters in Belfast. (© PA)
Customers were unable to access money in their accounts after a computer glitch affected customers for weeks over the summer.
It comes as Ulster Bank announces a £1.5bn injection to boost mortgage lending.
Stephen Cruise, Managing Director of Ulster Bank, told UTV: "We haven't seen a large number of people leaving the company.
"We have actually maintained customers and for that we are genuinely thankful.
"We believe a lot of the customers have been very loyal to those staff on our branches and this campaign is about continuing what we've been doing in the mortgage campaign, so we haven't lost customers and we're keen to continue to play our role in the NI economy."
Ulster Bank said it has increased its mortgage lending by 20% in all sectors of the mortgage market in the past quarter of 2012 - and believes the new push has resulted in more than 15,000 new mortgages in Northern Ireland.
Mr Cruise said: "We have simplified our pricing, introduced new products, initiatives and services to encourage, support and appeal to customers right across the borrowing spectrum."