New Webhook events for notification email delivery failures
September 29th, 2025
Two new Webhook events have been added to help you detect when a Signature Request notification email fails to reach a Signer or an Approver.
These events are triggered when a notification email cannot be delivered due to reasons such as an invalid email address, a full inbox, spam filtering, etc.
New available events are:
signer.notification_delivery_failed(API reference link)approver.notification_delivery_failed(API reference link)
These events allow you to:
- Detect notification delivery issues.
- Implement automated retries or alternative communication methods.
- Reduce manual support efforts.
Only the delivery failure of the initial notification email to a Signer or Approver triggers a Webhook. Failures for OTP codes, Reminders, or Followers notifications are not exposed.
To learn more about this feature, please consult our documentation.