After you have taken whatever steps are necessary to fill a particular order, in the message details for that order, click on “Order Filled”. By default, the current date is used. Before you mark the order as filled, you can edit this date in the field beside the “Order Filled” button.
Once you have flagged an order as filled, it is no longer in the Open Order list; it will now only be viewable in the Filled Order list. Only the first and last four digits in a credit card are displayed for a filled order. Once an order has been marked as filled, there is no way to recover this credit card information.