Immutable audit trail
In DefenceFile workflow language, an immutable audit trail is an event history that records material evidence and review actions without editing earlier entries.
Source baseline: 2026-06-15
Plain-language use
The aim is to show what changed, who acted, and when, while preserving earlier context for reviewers.
Safe use: Use for operational traceability; do not say the trail proves legal adequacy.
Official sources
- Home Office failure-to-prevent-fraud guidance v1.5
Updated 2025-10-10; accessed 2026-06-15.
- SFO compliance-programme evaluation guidance
Published 2025-11-26; accessed 2026-06-15.