Post Office Data Breach Leaks 502 Postmasters' Personal Information
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The Post Office exposed the personal data of 502 postmasters involved in litigation over the Horizon IT scandal. The breach occurred between April 25 and June 19, 2024, due to an unredacted legal settlement document published on its corporate website. The Information Commissioner’s Office (ICO) considered a £1.1 million fine but issued only a reprimand, citing the Post Office's remedial actions and the public sector approach to fines. The breach included names, home addresses, and postmaster status. The ICO noted deficiencies in the Post Office's technical and organizational measures, including lack of documented policies, quality assurance processes, and sufficient staff training.
Timeline
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04.12.2025 11:35 1 articles · 23h ago
Post Office Data Breach Leaks 502 Postmasters' Personal Information
The Post Office exposed the personal data of 502 postmasters from April 25 to June 19, 2024, due to an unredacted legal settlement document published on its corporate website. The ICO considered a £1.1 million fine but issued only a reprimand, citing the Post Office's remedial actions and the public sector approach to fines. The ICO noted deficiencies in the Post Office's technical and organizational measures, including lack of documented policies, quality assurance processes, and sufficient staff training.
Show sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35
Information Snippets
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The Post Office leaked personal data of 502 postmasters from April 25 to June 19, 2024.
First reported: 04.12.2025 11:351 source, 1 articleShow sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35
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The data breach involved an unredacted legal settlement document related to the Horizon IT scandal.
First reported: 04.12.2025 11:351 source, 1 articleShow sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35
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The ICO considered a £1.1 million fine but issued only a reprimand due to the Post Office's remedial actions.
First reported: 04.12.2025 11:351 source, 1 articleShow sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35
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The Post Office lacked documented policies, quality assurance processes, and sufficient staff training.
First reported: 04.12.2025 11:351 source, 1 articleShow sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35
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The Post Office offered compensation and identity protection services to affected individuals.
First reported: 04.12.2025 11:351 source, 1 articleShow sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35
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The ICO recommended clear protocols for publishing sensitive documents, centralized document management, and personalized training for relevant teams.
First reported: 04.12.2025 11:351 source, 1 articleShow sources
- Post Office Escapes £1m Fine After Postmaster Data Breach — www.infosecurity-magazine.com — 04.12.2025 11:35