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If merchant uses a double-phase payment mode then after completing authorization the enterprise has 4 days to confirm the payment (to confirm money withdrawal from the customer's account). Any enterprise's user (who has appropriate rights) can confirm the payment by right-click on the order(-s) and selecting 'Charge' option in the order's context menu.
You can easily find all unconfirmed orders by selecting 'Delayed' in the 'Order state' filter. Orders which await payment confirmation and which are within the selected time period (and probably other criteria applied if they are filled) will be shown.