post
https://api.ecartapi.com/api/v2/orders//fulfillments//events
This endpoint updates the status of an existing fulfillment. The tracking.number and the reference (as provided in fulfillment.package.reference****) must exactly match those used in the original fulfillment creation request. Any mismatch will result in an error.
If no reference number was provided when the fulfillment was created via the POST fulfillment endpoint, the system will default to "1".
All fields present are required.