Attach serial on sale order This action requires the "view sales order" and "update sales order" permissions. To attach a serial on order, find the serial's number and check its product and warehouse location. Open the order, where the serials should be attached and navigate to the "order items" section. Click the " + " button to open order items sub-items (the serials should be attached to these). Serial should have the same product as the product of the order item. Exception to this rule are items with product type  Service (e.g. SCL.0000004.000), where the serial should be any product on list of eligible products for that service.  The serial must also be on your warehouse location to appear in the dropdown. Click the "Link existing instrument serial number" button to open a dropdown, where the serial can be selected. Once the serial is attached, click the "Close" button to hide the dropdown.