BPAY payments appear on your bank statement, which is discoverable by the ATO if they open an audit.
Yes — this is a common workaround for AU casinos that don't accept BPAY directly.
Some intermediaries de-list gambling casinos over time as MCC and compliance
rules tighten. If bpay gambling sites is initiated from
your everyday debit/savings account, the credit-card ban doesn't apply — same as PayID and OSKO.
But for anything under A$20-25k, PayID is faster and more casino-friendly.
If you need a high-value deposit that exceeds your PayID
daily limit, BPAY is a fallback.