You may see the above message when booking in with Tuffnells, this is actually due to the setting that your company would have enabled at some point
Essentially, any channels that you have connected will appear here (alongside Manually booked shipments, and shipments sent to your account via our public API) and you can select any number of these channel connections to NOT return the consignment number we generate, and instead wait for the URN number Tuffnells provides us with at a slightly later point.
If you'd like to read more about what URN numbers are and how they can be activated on your account here
If you have any other queries about our Tuffnells integration or any other facet of Shiptheory, please get in touch with our support team here!