No, it is not guaranteed. The scan prevention alert message will only be shown if the recipient’s FPS proxy ID / bank account number / SVF account number is included in the scam reports provided by the Hong Kong Police Force. If there has not been any report to the Police against a particular FPS proxy ID / bank account number / SVF account number, the proxy ID / account number will not be included in the high risk alert.
You are advised to always verify the payment details (including the recipient’s identity) of every single transaction before making payment.