| Name | Type | Description | Notes |
|---|---|---|---|
| externalReferenceId | string | An optional reference can be provided by the API user; if included, it must be unique across shipments of the user | [optional] |
| order | \Toppy\Sendcloud\V3\Model\OrderCreateRequest | [optional] | |
| price | \Toppy\Sendcloud\V3\Model\OptionalPrice | [optional] | |
| sourceId | string | An external identifier that clients can provide to link the shipment with the corresponding record in their own system |