This endpoint allows existing shipment information associated to an order line item to be updated using the Extend Line Item ID or Line Item Transaction ID (the merchant’s unique identifier for the order line item). There are various changes that can be made to a shipment:
Destination or source location address
Product IDs associated to the shipment
New Tracking ID if the previous one was inaccurate
Shipment date and tracking URL (these fields are updated automatically if a supported shipping provider and valid Tracking ID is provided on the order)
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