You can request cancellation for a return by providing the return id to this endpoint.
parent_status of the return via the Retrieve a return endpoint to confirm whether the actual cancellation was successful.
Basic Authentication using API key and secrets is currently the main authentication mechanism.
The Sendcloud unique identifier of this return
1751075
Cancellation has successfully been requested
Message detailing more if the cancellation request was successful or not
"Cancellation requested successfully"