Once you have received payment for a pending order you can manually mark the payment as complete, so that your Ticket Tailor 'Orders' dashboard is the source of truth for your ticket sales.
To mark a payment as complete:
Open your 'Orders' dashboard.
Filter the page by selecting 'Pending orders' from the 'Order status' dropdown.
Click on the order ID, to open the full order information.
Click the button that says 'Confirm payment received'.
Optional: Add a transaction ID to identify the payment source.
Your order will now show as paid in your 'Orders' dashboard, your reports and on the check-in app.