MCA-Compliant Audit Trails: What Changed in 2025

The MCA mandate for audit trails requires that books cannot be altered without a traceable record of the change.

An audit trail only works if it is append-only and covers the whole lifecycle: create, post, modify, void, with the actor and reason for every step.

Arthvahi's event-sourced ledger records every mutation as an immutable event and exposes the audit log per entity, so the trail is a property of the data model, not a feature bolted on.