Complete audit-trail on every message and every transaction starting from inception to processing, delivery to response management and reconciliation to storage. Events and time stamp along with user activities or services associated with each event are stored and linked to underlying transaction. Documents that were attached to one of the messages or to the underlying transaction can become part of the audit trail. Notes exchanged by users through the transaction Notes window can become part of audit trail. The final audit trail report can be transaction centric or operational details as well.