ANZ says its transfer of 2.6 million customer accounts to National Bank IT systems went smoothly over the weekend, despite a few minor technical hiccups.
Work began last Friday to migrate ANZ accounts and customer records onto National Bank's IT platform as part of the merger between the two banks.
Following the switch, all of the banks customers now log into an ANZ-branded online banking website.
While this website has ANZ's branding, it has the layout, processes and features of National Bank's former internet banking service.
ANZ chief operating officer Craig Sims said the National Bank suite of systems was chosen because it was well-liked amongst users and that staff were now helping ANZ customers get familiar with the change.