Once your order has left our warehouse, you can view your invoices and purchase history by selecting 'Order History' from your Account drop down menu.
You will need to login to your account to see this:
You can view your invoice for any new or past orders by clicking 'View':
Once you are on your order, to display the invoice, click the 'Invoices' button in the top right:
Please note that if your order is still processing and has not been dispatched, the button will not be visible.