I’m having the same problem here, I had to revert to the lower API version just to use the fulfillment services. Even the support does not know what the fulfillment_order_id references. Any help from the devs would be great.
@Shopify_77 Any help would be much appreciated. 2 months and 0 reply!
This is not funny at all when the API docs says “Fulfillment orders are created automatically when an order is created.” but by the fact all website’s I see do not have this information. So how we should fulfill the order then?
For anyone else experiencing the same problem, I was getting no results when requesting the list of fulfillment_orders for a specific order until I gave the app the “read_merchant_managed_fulfillment_orders” permission.
To anyone who experiences the same problem in the future, granting the “read_merchant_managed_fulfillment_orders” permission to your application will work.