If a data breach is likely to result in a risk to the rights and freedoms of natural persons, the breached party and the supervisory authority must be notified
The data subjects must be notified directly without undue delay, the notification must:
Use clear and plain language
Disclose the nature of the breach
DPO Contact Information
Likely consequences
Proposed mitigations
Internal Parties should be notified first:
Security and IT team(s)
Legal Teams
Relevant support teams e.g. front desk
Prepare responses
External supporting parties may require notification too, such as:
Law enforcement
Insurance carrier
Forensics
Public Relations
The supervisory authority must be notified within 72 hours once a company becomes aware of a breach
Supervisory authorities must know:
The nature of the breach (number of people and records)
DPO Contact information
Likely consequences
Proposed mitigation
The information to the supervisory authority may be provided in phases if not known immediately