An analysis revealed when customers had contacted ANZ to cancel their life insurance policies, the man would alter their account number to his own and submit a false instruction arranging an unauthorised refund for that customer.
The unauthorised refund would instead go to his own bank account. The customers did not qualify for a refund and were not expecting one.
Other staff processed the payments without realising it was a false instruction.
In total he stole $191,101.08.
ANZ was the sole victim and sustained the full loss of the fraudulent payments, which were processed between early 2013 and mid 2018.
The man's lawyer said if it weren't for his "addictions" the offending would not have happened.
Judge Denys Barry said the offending "came on the back of the twin addictions of alcohol and gambling", and that the man had since taken steps to address these issues. He said the addictions went "hand in hand" with an anxiety disorder.
He sentenced him to 11 months of home detention.