post
https://api.signeasy.com/v3/rs/embedded//cancel
Cancel an embedded sending envelope that's still out for signature.
Add a message to tell your signers why. They get it in the cancellation email, and the rs.voided webhook event fires.
The pending_file_id comes back in the Fetch embedded sending URL response. It's also added to your redirect_url as a query parameter once the sender finishes.