Submit the signer's field values and signature
signer
Submit the signer's field values and signature
The signing action (spec §5.5): validates ownership and required-field completeness, persists values, appends participant.signed with audit facts, and advances to the next participant — or, when this was the final signer, triggers artifact generation (the envelope stays in_progress until artifacts exist; §4 status never lies). Replaying after success is an idempotent 200. Requires prior consent. An optional identity corrects the sender-provided name/company/title the signer’s auto-filled fields derive from, evidenced by participant.details_corrected.
POST
Submit the signer's field values and signature
Authorizations
HMAC-signed envelope token, as a bearer token or a token query param.