Upon the dry cleaner LOADING the garment conveyor connected to the red box, you will receive a SMS if you used a mobile number at drop off.
The machine will prompt you on screen if you require to stay at the pickup door for multiple locations on the garment conveyor.
This is for a smooth process of returning to the box for pickup.
Some dry cleaners do allow pickup to be paid for at the red box, this is clearly noted at the machine if available.