ASB bank says it uses a different model of ATM and operating system to that of its parent company Commonwealth Bank of Australia which has been embroiled in a money laundering scandal linked to its intelligent deposit machines.
The Australian federal government's financial intelligence unit AUSTRAC last week launched civil proceedings in the Federal Court against CBA.
It has accused the bank of systemic failure to comply with anti-money laundering and counter-terrorism financing laws and alleges 53,000 transactions were not reported.
The CBA said the problem stemmed from a coding issue which occurred during a software update in late 2012 on its intelligent deposit machines which meant they did not generate threshold transaction reports.
"Following the software update, a coding error occurred which meant the IDMs did not create the TTRs needed. This error became apparent in 2015 and within a month of discovering it, we notified AUSTRAC, delivered the missing TTRs and fixed the coding issue," the bank said.