In WooCommerce, Allow customer to change order status in WooCommerce answer to my previous question, allows the customer to approve (complete) orders in "My Account" page, but I don't know how to add a note automatically, so when the Customer approves an order (order status is changed to completed), I want to automatically add a note for customer.
Is it possible to add a Note when customer approve an order and status is changed to "completed"?