I get an error when trying to fulfil an order

During the process of fulfilling an order you get an error saying "All fulfillment orders must have the same delivery method type. Multiple delivery method types were found." This means that some of the products in the order have different shipping methods.

It is generally because some of the product/s don't have Requires Shipping ticked. Go into the products variant area, then to the Shipping Details panel and tick Requires Shipping. Then go back to the order fulfillment area and you can complete the process.

If you still get an error when fulfilling the order and it is for multiple products please fulfill each product separately. You can enter the same tracking for each item. The customer will receive 3 auto-notifications with the entered tracking details.