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On the Sales Order in the Payment Method, if you are using a method that has either Online Pre-Payment, Pre-Payment, or Payment on Sales Docs ticked. You can see what is ticked in the Payment Method Maintenance Screen.
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The customer will receive an email stating that the order requires Payment payment and attached will be the Proformaproforma.
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Your customer would need to scan or click the QR code for it to open the payment screen, to enter the credit/debit card details.
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