After placing a booking, every client receives a unique QR code which can be used by you in order to quickly verify the order.
It may be especially useful when your client pays online for your services.
You can scan this QR code directly from your app. In order to do that, you should click the scanner icon at the bottom right corner of the booking list.
After doing that, you get access to detailed information about a booking and can check, for example, whether it was paid or not.