If you receive an error message or notification that your transaction has been declined, first confirm that your credit card information and billing address have been entered correctly. The billing address will appear on the right side of the screen as you proceed through the checkout process. Use the "change" button next to the billing address to make any edits.
If you do not immediately receive an order confirmation message on-screen after submitting your order, do not click the "submit" or "place order" button multiple times. This may result in duplicate orders being placed.
If you have questions about whether or not your order was successfully placed, visit your account dashboard by clicking the "Account" button in the upper-right corner of any page. The "My Orders" link on the left side of the page will list all past orders. If your order was successfully placed, it will appear in the list of recent orders.