Download the Signature Attestation document of a signature request.

Use this operation to retrieve the Signature Attestation document of a signature request.

This PDF file is only available once all the following conditions are met:

• the signature request is COMPLETED (by the platform) or CLOSED (by the requester)
  
• the audit trail of the signature request is generated and signed by the platform and its proof receipt is available
  
  Once these conditions are met, the platform generates and signs the signature attestation and set the attestationAnchorId property.
  
  This is a publicly accessible endpoint: authentication is not required to retrieve a signature attestation (but the signature request identifier need to be known).