Internal notes are still exported to our FC's along with the notes from customers when we select the Add Notes to the order export file. This means that our customers and couriers get to read all the "internal" notes against our orders. There should be a way of exporting notes other than these internal notes.
Response from Linnworks customer support:
"Order notes field would be exporting a list of notes appended to an order, unfortunately it is not possible to apply a filter whether it's internal or processing."