As part of the Commonwealth Bank testing, you are required to run through a certain number of transactions.
We are aware of these ones:
1, 20 failed transactions with "Payment Declined"
From a Extension Works Customer:
CWB settings (we had to run through 20 failed transactions and that "Payment Declined" was part of the the CWB protocol, though their documentation - and yours - does not state this).
If anyone else can shed some more light on other CWB protocol, we would appreciate this information.