QR attended - QR validation cases - Mercado Pago Developers
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Events to validate QR Attended

EventExpected outputComments
QR scan before creating the order. The customer scans a valid QR code before placing the order.App displays a loading screen.Verify the fixed_amount=true on the Point of Sale.
QR scanning. The user scans a valid QR code after the order creation.App showcases a checkout screen.Verify the amount displayed on checkout.
Approved payment. The user makes a successful payment.POS system receives information about the approved payment.Verify Notifications receipt.
Rejected payment. The user makes a rejected payment.POS system receives information about the rejected payment and continues waiting for the order to be paid.merchant_order status must be opened.
Second payment attempt. At first, the user performs a rejected payment and then executes an approved payment.POS system receives information about the rejected payment and of the approved one later.Do not remove the order after a rejected payment.
Refunds. The payment refund is performed from the Point of Sale.Refunds impact the buyer account.See Refunds and cancellations.
Cancel order. The user decides to pay instead with cash.The order is removed; thus, when scanning the QR only the loading screen is displayed.Remove order from the Point of Sale.