The Commonwealth Bank’s internet system and mobile app were hit by an outage on Wednesday, with customers reporting issues with their credit card balances. Normality was observed by some customers by early Wednesday afternoon, but others continued to report issues.

The Commonwealth Bank has said that it is investigating disruptions to some EFTPOS machines and online banking systems. It is reportedly dealing with the issue as "a matter of priority." The bank also posted a statement on Facebook to let customers know that the company is aware that some may be experiencing intermittent issues with CommBank app, NetBank and CommBiz.

In a Facebook post, the Commonwealth Bank acknowledged that some merchant terminals have been affected. "For our customers impacted by this issue we are sorry, please be assured we are working on this as a matter of priority,” it said, adding that it would keep customers updated as new information comes to light.

Many customers have had their credit histories seemingly wiped out. Credit card balances disappeared from the bank’s smartphone app and its online banking facility NetBank, News.com.au reports.

Several customers took to social media to complain and claim that they were unable to use their credit cards. Others said they were still waiting for their paid wages. Some business owners reported that transactions were not going through and that they were losing money.

There were reports claiming that customers of other institutions could not pay for purchases through EFTPOS or contactless payments like PayPass and payWave. The digital issues also appeared to wipe the balances of personal and home loans and travel money card accounts. Bill payments with BPAY were also reportedly impacted.

A customer shared to aussieoutages.com about how she learned of the issues, saying it was when she tried to pay for groceries. “Just tried using my Comm Bank card at the supermarket and was told by the supermarket your card has been declined due to insufficient funds please contact the bank, which is not true,” she said.

Some customers complained about being unable to withdraw cash from ATMs. There were also reported issues of transfers between accounts and credit card payments where money had been withdrawn from one account but had not appeared in the other.

Based on the bank's 2017 annual report, over 6.2 million Aussies actively use the Commonwealth Bank’s online services.

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