The minimal content of the personal data breach notification
The notification referred to in paragraph 1 shall at least: (a) describe the nature of the personal data breach including where possible, the categories and approximate number of data subjects concerned, and the categories and approximate number of personal data records concerned; (b) communicate the name and contact details of the data protection officer or other contact point where more information can be obtained; (c) describe the likely consequences of the personal data breach; (d) describe the measures taken or proposed to be taken by the controller to address the personal data breach, including, where appropriate, measures to mitigate its possible adverse effects.
Chapter IV, Section 2, Article 33, Paragraph 3
Regulation's subject matter
Notification of a personal data breach to the supervisory authority (Article 33, Section 2, Chapter IV)