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When Privacy Goes Wrong, It Is Not Always a Data Breach: Lessons from a Recent Human Rights Review Tribunal Decision

  • Apr 11
  • 6 min read

Updated: Apr 13

A recent Human Rights Review Tribunal ruling (is a powerful reminder that privacy risks go well beyond data breaches and cyberattacks. The Tribunal found a New Zealand primary school unlawfully collected and misused highly sensitive medical information about a mother and her son, including details of past drug use and sex work. The information was used to form prejudicial views that shaped how the pair were treated. The result was humiliation, loss of dignity and real harm.


For NZ businesses and organisations, this case illustrates something that often gets lost in privacy conversations. The biggest privacy risks are not always about hackers or lost laptops. They can be about collecting too much information, using it inappropriately, and allowing inaccurate or irrelevant information to drive decisions about people.


What Happened: Privacy Misuse at a NZ School


The case, DNO & BPQ v Board of TRS School [2026] NZHRRT 8, involved a NZ primary school that unlawfully collected and misused highly sensitive medical information about a mother and her son.


In the boy's second week of school, a Starship community nurse provided copies of the mother's medical records to school staff during a meeting about the child's learning support needs. Auckland District Health Board later acknowledged the disclosure was wrong and formally apologised.


The file included an 11-page child protection report containing sensitive medical, family and social history. The Tribunal found a senior teacher used this information to label the mother a "liar", a "meth addict" and a "street worker", and warned other staff that she was dangerous.


The Tribunal determined the school should never have held this information. It found the medical records were used to form views that led to the mother and child being treated differently and poorly compared to others. The school was ordered to pay $29,100 in damages for humiliation, loss of dignity and harm.


Privacy Risks Beyond Data Breaches: Why Over-Collection and Misuse Matter


When most organisations think about privacy risk, they think about data breaches. Cyberattacks, lost USB drives, emails sent to the wrong person. Those are real risks. But this case shows three other types of privacy harm that deserve just as much attention.


Over-collection. The school held an 11-page medical file it had no business possessing. Under the Privacy Act 2020, IPP 1 requires that personal information only be collected for a lawful purpose connected to the agency's function, and IPP 4 says collection must not be unfair or unreasonably intrusive. Holding sensitive medical history about a parent's past goes well beyond what a school needs to support a child's learning.


Inappropriate use. Even where information is lawfully held, IPP 10 limits how it can be used. Information collected for one purpose should not be repurposed to judge, label or discriminate against someone. In this case, medical records collected for child welfare purposes were used to form negative views about a parent and, by extension, her child.


Access to incorrect or misleading information leading to bias and discrimination. The Tribunal found that the senior teacher cherry-picked from the records, drew inaccurate conclusions and dismissed later paediatric assessments showing the child was developing well. The Tribunal concluded the mother was deemed "less deserving of empathy" based on her past, and those views were likely shared with staff working with the boy. IPP 8 requires agencies to take reasonable steps to ensure information is accurate, up to date, complete, relevant and not misleading before using it. This case shows what happens when that principle is ignored. Incomplete or outdated information does not just create administrative problems. It can lead to biased treatment and real discrimination against the people it relates to.


It is worth noting that the Tribunal found the school had actively collected this information, not merely received it. Even where information arrives without being requested, once an agency holds personal information, the Privacy Act still applies. The safest response to receiving personal information you did not ask for is to ask whether you should hold it at all.


What Would Have Changed Under IPP 3A?


This case arose in 2019. Had the new IPP 3A been in force, the school would have been required to take reasonable steps to notify the mother that it had collected her personal information from a third party. That single step could have surfaced the problem much earlier and potentially prevented the harm that followed.


IPP 3A requires agencies that collect personal information indirectly to tell the individual concerned about the collection, including what was collected, the purpose, and their right to access and correct the information.


IPP 3A comes into force on 1 May 2026. For any organisation that collects personal information from sources other than the individual themselves, this is a timely reminder to have notification processes ready.


Internal Sharing and Access Controls


One of the more troubling aspects of this case is how the sensitive information spread within the school. The medical records were shared among staff without any apparent controls on who could access them or why. The senior teacher shared her views about the mother with other staff, and those views shaped how the child was treated in the classroom and playground.


This raises a practical question every organisation should be asking. Who in your business can access sensitive personal information? Is there any process for limiting that access to those who genuinely need it for their role? Without clear access controls and policies, sensitive information can easily move beyond the people who need it and into the hands of people who may misuse it, whether intentionally or not.


The Cost of Denial


There is one more lesson worth drawing from this case. The school repeatedly denied having received or holding the medical records. The Tribunal ultimately rejected those denials.


The mother told the Herald she probably would not have gone to the Tribunal had the school acknowledged wrongly using the records. She said she probably would have accepted an apology and moved on.


This is a pattern that plays out regularly. When organisations respond to a privacy complaint with denial or defensiveness, they often escalate a situation that could have been resolved early. A prompt, honest acknowledgement of what went wrong, a genuine apology and clear steps to prevent it happening again will almost always produce a better outcome than years of litigation. For the school, denial turned what could have been a difficult conversation into a Tribunal proceeding, public scrutiny and a damages award.


What Regulators Are Signalling


Privacy Commissioner Michael Webster has raised concerns about the broader risks of inaccurate information driving decisions, warning of inaccurate predictions, discrimination, unexplainable decisions, and lack of accountability. While he was speaking in the context of automated decision making, the principle applies just as strongly to human decision makers relying on outdated or irrelevant data.


The Privacy Commissioner has also been vocal about the need for stronger enforcement tools, including a potential civil penalty regime. If that eventuates, the financial consequences of mishandling personal information could increase significantly. But even under the current framework, the Tribunal can award damages of up to $350,000. This case shows those consequences are not hypothetical.


Practical Steps Worth Taking


This case is a prompt for any organisation that collects personal information to ask some hard questions.

  1. Audit what you hold. Consider reviewing the personal information your organisation holds. Are you collecting more than you need? Are you holding historical information that is no longer relevant to your purpose?

  2. Limit access to sensitive information. Consider whether the right people, and only the right people, have access to sensitive personal information. Put clear policies in place about who can see what and why.

  3. Check how information is being used. It may be worth reviewing whether personal information is being used only for the purpose it was collected. Staff who have access to sensitive information should understand the boundaries on how it can be used.

  4. Think about accuracy and relevance. Before relying on personal information to make decisions about someone, consider whether the information is current, accurate, complete and relevant. Out-of-date or incomplete information can lead to biased and harmful decisions.

  5. Prepare for IPP 3A. If your organisation collects personal information from third parties rather than directly from individuals, make sure you have processes ready to notify those individuals by 1 May 2026.

  6. Respond well when things go wrong. If a privacy issue is raised, take it seriously. Acknowledging a mistake early, apologising and taking corrective action is almost always less costly than denial and litigation.

  7. Train your people. Privacy is not just a policy exercise. The people who handle personal information day to day need to understand their obligations. This case shows how a single staff member's misuse of sensitive records can cause significant harm and a costly legal outcome.


Every business is different, and whether these issues apply to you will depend on your specific circumstances. If you would like to talk through what this means for your business, I would love to help. Get in touch at rachel@obrienlegal.co.nz or visit obrienlegal.co.nz.


This post is general information only and is not legal advice. If you have specific questions about your situation, please seek independent legal advice.


 
 
 
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