Sometimes you may want to allocate a Purchase Order Number to an order. This can come from your client for example to identify a particular job and ensure that you get paid correctly when it comes to invoicing. Here’s how you do it. Go to the correct order and click on the ‘Order Overview’ Tab. Click ‘Edit Order’. Scroll down to the Purchase Order box and enter the number. It is usually a good idea to add PO as a prefix for quick searching in the search field. Click ‘Save’. The Purchase Orderner Number is now badged to that order. It can be searched for and will appear on any invoice you send for that order.