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https://www.productionai.institute/graph/events/evt-incident-uk-post-office-horizon

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Production AI Institute public record · UK Government: UK Post Office Horizon — AI as Infallible Evidence · observed 1999-01-01
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UK Government: UK Post Office Horizon — AI as Infallible Evidence

The UK Post Office prosecuted over 700 subpostmasters for theft and fraud based on accounting discrepancies produced by the Horizon IT system — a system known internally to have software bugs. Subpostmasters were imprisoned and bankrupted. The Post Office suppressed evidence of Horizon's defects fo…

Confidence
80%
Sources
2
Entities
1
Detected
detected 10074d ago

Event summary

The UK Post Office prosecuted over 700 subpostmasters for theft and fraud based on accounting discrepancies produced by the Horizon IT system — a system known internally to have software bugs. Subpostmasters were imprisoned and bankrupted. The Post Office suppressed evidence of Horizon's defects fo…

D6D8

Linked entities

  • Fujitsu / Post Office Ltd

    organisation | 72%

Related graph edges

EdgeTypeConfidence
ent-org-fujitsu-post-office-ltd to ent-psf-d6maps to62%
ent-org-fujitsu-post-office-ltd to ent-psf-d8maps to62%

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Event dates

  • Happened 1 Jan 1999

  • Detected 1 Jan 1999

Sources

  • UK Post Office Horizon — AI as Infallible Evidence — PAI incident record

    pai assessment | checked 3 July 2026

    Open source
  • UK Post Office Horizon IT Inquiry — official inquiry

    primary | checked 3 July 2026

    Open source
Cite this record

"UK Government: UK Post Office Horizon — AI as Infallible Evidence." https://www.productionai.institute/graph/events/evt-incident-uk-post-office-horizon (observed 1999-01-01; retrieved 2026-08-01). PAI.

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