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When the QR code is scanned, it will open Wahanda Treatwell Connect with the eVoucher code already pre-filled, so you just need to double check the data is correct and redeem the eVoucher. Remember, by redeeming an eVoucher this way, you're not blocking out that appointment time to other customers on WahandaTreatwell, so remember to close out that slot in your Calendar in Connect.
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Customers who book eVouchers using on their iPhones using the Wahanda Treatwell App can download their eVoucher as a Passbook to their phone. A Passbook is an equivalent of the printed eVoucher - it also has an eVoucher number on it and a QR code that you can scan. So just follow the step above to redeem their eVoucher.