NAB Merchants - Frequently asked questions


We have changed the way we process manual credit card transactions, effective 18 September 2016. This affects all merchants who process credit and debit card transactions using paper vouchers including mail order or telephone order forms. These changes are expected to save you time and increase the speed in which cardholder funds are received.

The changes are as follows:

  • New options and sequence of keypad prompts when calling the NAB KeyAuth service on 13 25 15
  • New Purchase service via NAB KeyAuth (option 4) that enables financial settlement of transactions (including automatic real-time authorisation)
  • Merchants no longer required or able to submit vouchers through branches or post office boxes in order to receive the cardholders’ funds
  • No more manual credit card refunds or manual debit card transactions