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Reporting personal data breaches to authorities / data subjects


A personal data breach must be reported to the supervisory authority if the breach may pose a risk to data subjects rights and freedoms. Data subjects, on the other hand, must be informed if the breach is likely to pose a high risk to their rights and freedoms. For example, registrants may take steps to reduce the adverse effect (e.g. by closing their credit card).

The notification must include the following information:

  • a clear description of the personal data breach
  • the name and contact details of the data protection officer or other contact point from which further information can be obtained
  • the likely consequences of the personal data breach
  • the measures proposed or already taken by the controller; where appropriate, measures to mitigate possible adverse effects.
Connected other frameworks and requirements:
33. Notification of a personal data breach to the supervisory authority
34. Communication of a personal data breach to the data subject
16.1.5: Response to information security incidents
ISO 27001
6.1.3: Contact with authorities
ISO 27001
A.10.1: Notification of a data breach involving PII
ISO 27018
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