Australia is bringing in name and account matching to combat scams. So the account number given must match the associated name.
This should be baked into Debut by design, as you can put anything in that name field, as I’ve read on stuff and seen on channel 9‘s YouTube, banks not checking for name and number matching.
To prevent people using an API to extract a name by pasting account number, both fields must be filled in and the matching takes place in the background, similar to how a debit or credit card number, expiry date, and CVV work.