Who must be notified in the event of a data breach?

Asked by: Elmer Armstrong  |  Last update: June 5, 2026
Score: 5/5 (72 votes)

In a data breach, you must notify affected individuals, relevant regulators/supervisory authorities (like state Attorneys General or the ICO under GDPR), and potentially law enforcement, depending on the jurisdiction and data type, often within strict timelines (e.g., 72 hours under GDPR). Federal laws (HIPAA) and state laws (all 50 US states) dictate specific requirements for personal information, health data, and financial data, sometimes requiring notification to credit reporting agencies or media.

Who should be notified of a data breach?

When your business experiences a data breach, notify law enforcement, other affected businesses, and affected individuals.

Who is responsible to make a notification in the event of a data breach?

In the case of a personal data breach, the controller shall without undue delay and, where feasible, not later than 72 hours after having become aware of it, notify the personal data breach to the supervisory authority competent in accordance with Article 55, unless the personal data breach is unlikely to result in a ...

Who to contact in the event of a data breach?

By law, you've got to report a personal data breach to the ICO without undue delay (if it meets the threshold for reporting) and within 72 hours.

Who must you notify once you become aware of an eligible data breach?

If an entity is aware of reasonable grounds to believe that there has been an eligible data breach, it must promptly notify individuals at risk of serious harm and the Commissioner about the eligible data breach (see Notifying Individuals About an Eligible Data Breach).

What Are Data Breach Notification Laws? - Emerging Tech Insider

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When must you inform an individual of a data breach?

You must do this within 72 hours of becoming aware of the breach, where feasible. If the breach is likely to result in a high risk of adversely affecting individuals' rights and freedoms, you must also inform those individuals without undue delay.

Who is responsible for notifying patients in case of a data breach?

The HITECH Act mandates healthcare organizations to notify affected individuals, HHS, and the media (if applicable) of data breaches involving Protected Health Information (PHI).

Who should you contact if you suspect a data breach or security incident?

Organisations are required to report personal data breaches to the Data Protection Commission (DPC), or their relevant supervisory authority, where the breach presents a risk to the affected individuals. Organisations must do this without undue delay and definitely within 72 hours of becoming aware of the breach.

What must you do in the event of a data breach?

Overview

  • Contain the breach immediately to prevent any further compromise of personal information;
  • Assess the risks of harm to affected individuals by investigating the circumstances of the breach;
  • Notify affected individuals if deemed appropriate in the circumstances;

Who must report a data breach?

Data Controllers must inform the Office of Data Protection of a data breach. 'Data Controller' means any ADGM registered entity that alone or jointly with others determines the purposes and means of the processing of Personal Data.

Who is responsible for breach notification?

Covered entities bear the main responsibility for breach notifications. Once a breach is identified, they must inform affected individuals, the Department of Health and Human Services (HHS), and, in cases of larger breaches, the media.

Who has to be notified in a HIPAA data breach?

If the CUIMC HIPAA Response Team confirms a HIPAA Breach of Unsecured PHI has occurred, the CUHC must provide notification, as described below, to: The Affected Individual(s) The Secretary for Health and Human Services, Office for Civil Rights. To the media (in certain circumstances)

What is the first step you should take after a data breach occurs?

If you discover a data breach, you should immediately contain the damage by isolating systems, document everything, and notify the proper authorities (internal IT, legal, and potentially external regulators/law enforcement) while preparing to inform affected individuals, focusing first on stopping further data loss and preserving evidence for investigation.
 

Who is responsible to make a notification in the event of a data breach to the supervisory authority?

The GDPR requires that a controller notify a personal data breach without undue delay and, where feasible, no later than 72 hours after becoming aware of it.

Who must be notified about the confidentiality breach?

The Rule requires vendors of personal health records and related entities to notify consumers following a breach involving unsecured information. In addition, if a service provider to one of these entities has a breach, it must notify the entity, which in turn must notify consumers.

Which regulatory body should be notified of a data breach?

You must report a notifiable breach to the ICO without undue delay, but not later than 72 hours after becoming aware of it. If you take longer than this, you must give reasons for the delay.

What is the first thing you should do in the event of a suspected breach?

Contain the Cyber Breach

The first step you should take after a data breach is to determine which servers have been compromised and contain them as quickly as possible to ensure that other servers or devices won't also be infected.

What must organizations do in the event of a data breach?

Once the data breach has been reported, the company needs to determine how to notify the affected parties and explain how the cybercriminals accessed the data and how they have used the stolen information. Companies should also provide contact details for any additional questions regarding the situation.

Who to report a data breach to?

You can report a breach to the ICO online or by phone. Read their guidance on reporting a data breach.

What to do in the event of a data breach?

You must report any confidentiality breach in line with your local incident reporting procedure. You must report this to the Information Commissioner's Office (ICO) within 72 hours of becoming aware of the incident if it is likely that the individuals whose data has been breached will be harmed.

Who should you contact if you suspect a cyber issue or incident?

Welcome to the Internet Crime Complaint Center. The Internet Crime Complaint Center (IC3) is the central hub for reporting cyber-enabled crime. It is run by the FBI, the lead federal agency for investigating crime. For more information about the IC3 and its mission, please see the About Us page.

Who should you report a personal data breach to as soon as it's identified?

If you are required to report a breach, you should report it immediately. The HSE must report breaches to the Data Protection Commission within 72 hours of a notifiable personal data breach. This is done through the DDPO offices, following consultation with the local service where the breach occurred.

Who must be notified in case of a data privacy breach?

Under the Data Privacy Act, the data subject has the right to be notified In the enforcement of this right, the PIC MUST NOTIFY the data subject within seventy-two (72) hours upon knowledge of or reasonable belief that a personal data breach has occurred.

What are the four notification requirements in the event of a breach of PHI?

HIPAA Breach Notification Rule

  • The nature and extent of the PHI involved, including the types of identifiers and the likelihood of reidentification.
  • The unauthorized person (or people) who used the PHI or to whom the disclosure was made.
  • Whether the PHI was actually acquired or viewed.

Who do you inform if there is a data breach?

In the event that a data breach occurs, POPIA requires that businesses inform the Information Regulator, as well as the person or persons whose data has been compromised (“data subjects”) as soon as reasonably possible after the breach has been discovered.