Incident Response: Handling Transaction and Delivery Failures

GuideUpdated: May 2026

This guide provides technical instructions for the identification, analysis, and remediation of failed document transactions and email delivery exceptions.

This guide provides technical instructions for the identification, analysis, and remediation of failed document transactions and email delivery exceptions.


Prerequisites

  • Administrative or Owner-level permissions (for global monitoring).
  • Knowledge of the target envelope's current status (Pending/Failed).

Strategic Overview

In high-volume document logistics, exceptions such as email bounces, authentication failures, and system-level timeouts are inevitable. IUSign's Incident Response framework is designed to provide immediate visibility into these failures, allowing administrators to identify the root cause and execute corrective actions without compromising the integrity of the overall workflow. Prompt remediation of delivery failures is essential for maintaining organizational velocity and ensuring that critical agreements are executed within their designated temporal windows.


Implementation Sequence: Failure Analysis

1. Detection and Forensic Review

Failed transactions are automatically flagged with the Failed status in the document repository. Select the target envelope to view the Failure Log:

  • System Exceptions: Internal processing errors (rare).
  • Delivery Exceptions (Bounces): SMTP failures indicating the recipient's mail server refused the invitation.
  • Authentication Failures: The recipient failed to satisfy the 2FA challenge.

2. Interpreting SMTP Status Codes (Bounces)

If a delivery failure occurs, review the SMTP response recorded in the audit trail:

Error TypeProbable CauseCorrective Action
Hard Bounce (550)Invalid or non-existent email address.Correct the email address identity.
Soft Bounce (450)Recipient mailbox full or temporary server issue.Resend Reminder after 24 hours.
Spam RejectionSender reputation or content block.Configure SPF/DKIM to improve deliverability.

3. Remediation Protocols

Once the cause is identified, execute the appropriate recovery protocol:

  • Identity Correction: If the email address was mistyped, use the Correction protocol to update the identity and re-dispatch the token.
  • Security Reset: If a recipient is locked out due to multiple failed 2FA attempts, use the Reset Access action in the recipient module.
  • Workflow Cloning: For complex failures involving document content errors, utilize the Clone and Resend protocol.

Strategic Prevention: Minimizing Failure Rates

  • Identity Validation: Implement pre-sending validation of recipient email addresses using external verification tools to minimize hard bounces.
  • White-Label Optimization: Ensure SPF and DKIM records are correctly configured for your corporate domain to maximize deliverability and recipient trust.
  • Automated Monitoring: Regularly review the Failed repository filter to identify and rectify issues before they impact business outcomes.

Diagnostic and Resolution Protocols

System ObservationProbable CauseResolution Protocol
"Failed" without reasonIntermittent API timeoutRefresh the page to synchronize the latest backend status. If unresolved, contact Support.
Recipient says "Not Received"Silent SMTP dropThe recipient's mail server may have flagged the email as junk. Advise the recipient to check their spam folder and whitelist the sender domain.
Correction blockedWorkflow integrityYou cannot correct an envelope that has been finalized or formally declined.

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