Update a Shipment

Use the POST: Initialize a shipment for tracking endpoint to include additional information (e.g., shipment attributes, shipment identifiers) for a shipment after the shipment has been created. To update a shipment, you must either,

• Create a new shipment which will then be de-duplicated with the original, or
• Delete the shipment to stop tracking and then create a new shipment with the POST: Initialize a shipment for tracking endpoint.