"WINNER!! As a valued customer you have been selected to receive a £900 prize reward! To claim call 09061701461. Code KL341."
From PRZ-WIN · received Jun 8, 2026 at 14:37:02 · routed to quarantine
98.4%
model confidence
Classified as spam because
Top contributing TF‑IDF terms, ranked by weight in the Decision Tree's decision path
Sentiment signal (SentiWordNet)
Score +0.81 — matches the bimodal urgency/reward pattern typical of spam (corpus avg. +0.17)
Audit trail
Logged per FR2 — message hash, label, confidence, timestamp; no raw text persisted (FR10)
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Received via SMS gateway
14:37:02.011 · sender PRZ-WIN
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Preprocessed
14:37:02.014 · lowercase → punctuation removed → stop words removed → tokenised (+3ms)
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TF‑IDF vectorised
14:37:02.026 · mapped to 5,572-document feature matrix (+12ms)
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Scored by Decision Tree v2.4
14:37:02.054 · label spam, confidence 98.4% (+28ms)
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Routed to quarantine
14:37:02.071 · held for 30 days, recipient not notified (+17ms)
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Logged to audit trail
14:37:02.079 · hash, label, confidence, timestamp recorded · total latency 68ms
Review actions
An override is logged as an analyst correction and queued for the next retraining run.
Message metadata
- Sender ID
- PRZ-WIN
- Channel
- SMS · enterprise gateway
- Model version
- decision-tree-v2.4
- Total latency
- 68ms (P99 target <100ms)
- Stored content
- Hash only — GDPR/CCPA
- Retention
- 29 days remaining