Wooden letter tiles spell 'Breach' against a blurred natural background, concept of security or violation.
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The 72-Hour Rule: When and How to Notify the ICO

Fail to notify the ICO of a notifiable breach within 72 hours, and your risk of fines increases. Here’s what to know.

When a personal data breach occurs and is likely to result in a hig risk to individuals, you must notify the Information Commissioner’s Office (ICO) within 72 hours of becoming aware.

Your report must include:

  • Nature of the breach
  • Categories and volume of affected data
  • Consequences of the breach
  • Measures taken or proposed

Delays must be justified. Keep internal documentation even if the breach isn’t reported.

Tip: Set up an internal breach notification process so that teams act quickly.

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