Commonwealth Bank customers across the country have been unable to use their cards on Monday after it suffered a major online outage.
“We’re aware of an issue impacting cards,” a statement on the Netbank app reads.
“Credit cards, debit cards and some card settings may be unavailable right now,” it said on its website.
“Some payments may also be unsuccessful. We‘re working urgently to fix this as soon as we can.
“We apologise for any inconvenience caused.”
Furious customers took to Twitter to vent their frustration.
“Bills to pay!!!!!!!!!!... who pays my late fees????????????? Not forgivable in today's online world!!!” one customer said.
Another customer expressed concerns that it was part of a broader hack attack, while others still noted how they were yet to receive payments - or have payments processed.
Outage monitor Downdetector noted user reports across the country, with reports peaking at around 10am on Monday morning.
CommBank said it was beginning to see services resume at around 1:30pm AEST.
"We are starting to see services resume. If you're still experiencing issues please insert your card and use your PIN. If you use your device to tap and pay, cardless cash is still available at CommBank ATMs," the bank said in a statement on Twitter.