You will need to be a holder of a paid PassKit plan - see https://passkit.com/pricing/ to sign up. Free PassKit accounts holders will not be able to send push updates or see beacon alerts on the lock screen unless you have a pass certificate uploaded and installed in your account.
Please ensure that your Bluetooth is turned on. Currently, if you have inputted both GPS and iBeacon alerts, GPS lock screen messages take precedence over iBeacon messages. We will update you when this limitation has been lifted. For now, if your beacon falls in the GPS range, only GPS alerts will appear.
To use beacon alerts with passes, we would recommend removing GPS lock screen messages at this stage.