National Australia Bank has apologised a second time in less than a week after another system outage left customers unable to make retail transactions or withdraw cash from ATMs.
The lender, whose online and mobile banking services went down last week, apologised for Monday's problems and for the resulting long waits to speak to its call centres - again urging people to do their business in person at one of its branches.
The latest outage hit both personal and business customers, with healthcare providers unable to process payments via the HICAPS system.
"The outage meant some NAB customers were not able to use their NAB cards in ATMs or EFTPOS terminals. It also affected some NAB merchant terminals and HICAPS," NAB said.
"Our teams are monitoring these services, and we're very sorry for the trouble this caused."
NAB said services started to come back on line from 1330 AEDT.
