New Parcel field 'internal_reference'
We have introduced a new field named internal_reference on the parcel objects.
internal_reference allows you to assign a reference to track and identify each parcel within your shipment.
You can specify this field in the request body when creating a shipment. It will be stored with the parcel object and accessible via the API.
internal_reference will neither be displayed on any label nor be transmitted to the carrier.