Instead, customers will be able to use Android or Apple smartphones to authorise the transaction.
The customers will need to install a new CBA app on their mobiles to select the amount they want and the account from which it is come.
Two unique numbers will be issued: an eight-digit cash code and a four-digit PIN.
At the ATM, customers will be bale to select a "withdraw cardless cash" option, enter both codes - and the cash will hopefully be dispensed, along with a receipt.
More than 3000 ATMs will be progressively equipped with the Cardless Cash feature, the CBA says
Customers will be limited to one cardless transaction a day, with a limit of $200.
Other people will be able to withdraw cash on the customer's behalf - but the customer must first enter their name in the app, along with a phone number for confirmation.