Laws · GDPR ·art-34-par-1 EN LLM context A cited markdown file you can paste into your AI assistant (ChatGPT, Claude, a RAG or project knowledge base) to ground it in this document. Contains: this document’s text, its sections with their topics, and the full text of every law provision it applies. Everything links back to its source on overview.legal — legal information, not advice.
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When the personal data breach is likely to result in a high risk to the rights and freedoms of natural persons, the controller shall communicate the personal data breach to the data subject without undue delay.
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Cited by
- Guidelines 01/2021 on Examples regarding Personal Data Breach Notification
- Guidelines 03/2022 on Deceptive design patterns in social media platform interfaces: how to recognise and avoid them
- Guidelines 9/2022 on personal data breach notification under GDPR
- GERMANY DPA: Insufficient fulfilment of data breach notification obligations
- Hungarian political party: Insufficient fulfilment of data breach notification obligations
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- Robinson Tours Ltd. (Robinson Tours Idegenforgalmi és Szolgáltató Kft.): Insufficient technical and organisational measures to ensure information security
- Towarzystwo Ubezpieczeń i Reasekuracji WARTA S.A.: Insufficient fulfilment of data breach notification obligations
- TUiR Warta S.A.: Insufficient fulfilment of data breach notification obligations
- Śląski Uniwersytet Medyczny (Medical University of Silesia): Insufficient fulfilment of data breach notification obligations
- BELGIUM DPA: Insufficient technical and organisational measures to ensure information security
- POLAND DPA: Insufficient fulfilment of data breach notification obligations
- Fastweb S.p.A.: Non-compliance with general data processing principles
- Budapest Főváros Kormányhivatala XI. kerületi Hivatalát (11th District Public Health Department of the Government Office of the Capital City Budapest): Insufficient technical and organisational measures to ensure information security
- Cyfrowy Polsat S.A.: Insufficient technical and organisational measures to ensure information security
- Sopockie Towarzystwo Ubezpieczeń ERGO Hestia S.A.: Insufficient fulfilment of data breach notification obligations
- Fundację Promocji Mediacji i Edukacji Prawnej Lex Nostra: Insufficient fulfilment of data breach notification obligations
- Bank Millennium S.A: Insufficient fulfilment of data breach notification obligations
- Psykoterapiakeskus Vastaamo: Non-compliance with general data processing principles
- Santander Bank Polska S. A.: Insufficient fulfilment of data breach notification obligations
- Głównego Geodetę Kraju: Insufficient fulfilment of data breach notification obligations
- Housing association: Insufficient fulfilment of data breach notification obligations
- Housing cooperative: Insufficient fulfilment of data breach notification obligations
- MALTA DPA: Non-compliance with general data processing principles
- Company: Insufficient technical and organisational measures to ensure information security
- Company: Insufficient fulfilment of data breach notification obligations
- POLAND DPA: Insufficient fulfilment of data breach notification obligations
- District Court Krakow: Insufficient fulfilment of data breach notification obligations
- Santander Bank Polska S.A.: Insufficient fulfilment of data breach notification obligations
- National Prosecutor's Office: Insufficient legal basis for data processing
- mBank: Insufficient fulfilment of data breach notification obligations
- Healthcare facility: Insufficient technical and organisational measures to ensure information security
- Hospital: Insufficient fulfilment of data breach notification obligations
- Hospital: Insufficient technical and organisational measures to ensure information security
- City of Dublin Education and Training Board: Insufficient technical and organisational measures to ensure information security
- Hestia Publishers & Booksellers I. D. Kollaros & Co. S.A.: Insufficient technical and organisational measures to ensure information security
- Court Bailiff: Insufficient fulfilment of data breach notification obligations
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- Opinion 2/2026 on the Proposal for a Directive amending Directives (EU) 2016/2341 and 2016/97 as regards the strengthening of the framework for occupational retirement provision
- Fundację Lumus: Non-compliance with general data processing principles
- University of Limerick: Insufficient technical and organisational measures to ensure information security
- EDPB-EDPS Joint opinion 2/2026 on the Proposal for a Regulation as regards the simplification of the digital legislative framework (
- If it ain’t broke, don’t fix it? Ten improvements for the upcoming tenth anniversary of the General Data Protection Regulation
- Midlands Regional Hospital Tullamore, County Offaly: Insufficient technical and organisational measures to ensure information security
- UODO (Poland) - DKN.5131.27.2023
- EDPB-EDPS Joint Opinion 02/2023 on the Proposal for a Regulation of the European Parliament and of the Council on the establishment of the digital euro
- EDPB-EDPS Joint Opinion 03/2022 on the Proposal for a Regulation on the European Health Data Space
- EDPB Annual Report 2021
- Contribution of the EDPB to the evaluation of the GDPR under Article 97
- Amazon EU Sàrl, venant aux droits de Amazon Services Europe Sàrl v European Commission
- TR v Land Hessen
- Safe Interenvios, SA v Liberbank, SA and Others
- Commission of the European Communities v Council of the European Union
- BGH - VI ZR 97/22
- UODO (Poland) - DKN.5131.5.2025
- Altex Romania S.R.L: Insufficient technical and organisational measures to ensure information security
- HelHO - HelHO:2026:8
- Italian DPA: Municipality of Rieti breached GDPR by publishing 31,000 taxpayers' waste
- Hôpital privé de la Loire: Insufficient technical and organisational measures to ensure information security
- Slovenian DPA: Controller breached Art. 32, 15 and 34 GDPR over data breach and access
- Guidelines 04/2026 on the application of the power to impose administrative fines in relation to other corrective powers under the GDPR
Related across sources
Guidelines 9/2022 personal data breach notification under GDPR Guidelines ·EDPB Apr 4, 2023 Notification Obligation Data Breaches Personal Data
Guidelines 01/2021 Examples regarding Personal Data Breach Notification Guidelines ·EDPB Jan 3, 2022 Notification Obligation Data Breaches Personal Data
C-340/21 VB v Natsionalna agentsia za prihodite C-340/21 (VB v Natsionalna agentsia) CJEU Dec 14, 2023 Integrity and Confidentiality Principle Data Breaches Notification Obligation
C-768/21 TR v Land Hessen In Case C-768/21, the Court of Justice of the European Union (First Chamber) ruled on a preliminary reference from the Verwaltungsgericht Wiesbaden concerning TR's challenge of… CJEU ·First Chamber Sep 26, 2024 Supervision Data Breaches Integrity and Confidentiality Principle
C-77/21 Digi Távközlési és Szolgáltató Kft. v Nemzeti Adatvédelmi és Információszabadság Hatóság In this preliminary ruling, the CJEU interpreted Articles 5(1)(b) and 5(1)(e) GDPR in proceedings between Digi Távközlési és Szolgáltató Kft. and the Hungarian National Authority… CJEU ·First Chamber Oct 20, 2022 Retention Period Storage Limitation Personal Data
14/2021 Cypriot court backs DPA fines of €40,000 each on football clubs and €25,000 on processor On 26 July 2021, a journalist informed the Cypriot DPA of a security vulnerability on an online platform. This online platform hosted ticket purchase sites of two Cypriot football… Administrative Court of Cyprus May 12, 2026 Controllers Processors Supervisory Authorities