A PO number is a unique number used by certain organizations for verification purposes when making purchases. When you order with a PO number, we will include this PO number on the invoice. This enables your organization's administration to confirm the invoice is valid. If your organization uses formal PO numbers, please enter the PO number during the online checkout process when prompted.
If your organization does not use formal PO numbers but you still want to buy online, then enter your initials and date in the 'purchase order number' box instead. You will then get an invoice in your account for your organization to approve.