High-confidence anomaly — corroborating signals across services

multi signal corroboration

Three independent services flag the same movement: HS code anomaly, manifest weight inconsistency and a documentary chain gap. Combined confidence is high; hold and escalation recommended.

Rule / model · TR-ALERT-2.3

• CaveatCarrier weight tolerance previously low

Analytics services may suggest · authorised reviewers decide · KATLAS signs the receipt

Movement & service context

Where the signal came from

Authority & policy

Who may decide

Authority is checked at the point of action. Each intervention names the role, the policy and the rule version, and is bound by the evidence sufficiency note recorded with the action.

Evidence boundary

Supporting, contradictory, withheld

Only references, custodian and provenance markers are surfaced. Raw documents stay under local custody.

Withheld evidence · count 4 · Contradictory · 0

Recommended actions

What the rules suggest

• hold

  Evidence · sufficient

  Hold while corroborating evidence is reconciled.

  Allowed roles · hmrc case officer

• escalate

  Evidence · sufficient

  Escalate to supervisor given combined confidence.

  Allowed roles · hmrc case officer, supervisor

Learning outcome

Feedback to the rules

Classify what this case taught the system. The outcome feeds back to the rules service so signals improve over time.