The banking royal commission has heard the Commonwealth Bank regularly charged deceased customers for financial advice. In one case, an adviser knew his client had been dead for more than a decade, but continued to collect service fees.
Prime Minister Malcolm Turnbull ordered the royal commission last year following a series of scandals involving financial misconduct.
The Commonwealth Bank has been under scrutiny recently for alleged breaches of anti-money laundering laws, and for providing inappropriate financial advice to customers.
Treasurer Scott Morrison has warned financial executives could face jail sentences from evidence brought up at the commission.