A developer encountered an issue where Shopify’s Fulfillment Orders API endpoint returned an empty array despite using a valid order ID, while the same request worked correctly on other stores.
Initial troubleshooting suggestions included:
Verifying API access scopes (read_assigned_fulfillment_orders, read_merchant_managed_fulfillment_orders, etc.)
Checking order fulfillment status (must be unfulfilled or partially fulfilled)
Ensuring the order contains fulfillable items
Confirming correct order ID format (numeric, not order name)
Investigating whether legacy fulfillment API was used instead
Resolution:
The root cause was identified as a missing origin_address on the order. Without this configured, Shopify cannot generate fulfillment orders. The developer is now working with their customer to set up the origin address for the store’s orders.
Summarized with AI on October 27.
AI used: claude-sonnet-4-5-20250929.