Privacy penalties – the beginning of a new era

Insights16 Oct 2025

A recent Federal Court decision is a watershed moment for privacy law in Australia. The judgement in Australian Information Commissioner v Australian Clinical Labs Limited (No 2) [2025] FCA 1224 is one of many firsts, including: 

  • the first civil penalty handed down under the Privacy Act 1988 (Cth);
  • assessment of Australian Privacy Principle (APP) 11.1(b), being the obligation for entities to take reasonable steps to protect the personal information they hold from unauthorised access, modification, or disclosure; and
  • judicial consideration of the requirement to notify the Office of the Australian Information Commissioner (OAIC) ‘as soon as practicable’ after an eligible data breach.

We consider the recent decision and its implications for Australian businesses. 

Key takeaways

  • This decision was made in the context of the former section 13G of the Privacy Act, which contained a maximum penalty of A$2.2 million for bodies corporate. This has now been increased, meaning most companies in Australia will be exposed to a maximum penalty of A$50 million per contravention.
  • Given the size of the maximum penalty and that a penalty may be applied for each individual impacted, there are substantial risks for businesses and insurers alike. Cyber incidents now have the potential to bankrupt even Australia's largest companies. It is imperative to remain proactive in maintaining and uplifting cyber security practices.  
  • Businesses cannot wholly outsource their cyber and privacy obligations to rely on third-party assessments. They must take responsibility for their own cybersecurity posture.
  • In the context of mergers and acquisitions, cyber risk should become a key concern when undertaking due diligence.
  • APP entities should carefully consider when to notify the OAIC in relation to an eligible data breach. 

Future action will be subject to the higher penalty provisions now in force under the Privacy Act.

Background

Australian Clinical Labs (ACL) is one of the largest private hospital pathology businesses in Australia. In December 2021, ACL acquired Medlab, a pathology business that collected and held personal information and sensitive information in connection with providing health services. 

In February 2022, Medlab’s computer assets were the target of a ransomware attack. ACL instructed a computer forensics firm to investigate the incident, who completed a 44.5-hour investigation over a small subset of the impacted computers. Based on the investigation and the lack of evidence of data exfiltration, ACL ultimately formed the view in March 2022 that the incident did not require notification as an eligible data breach to the OAIC or impacted individuals.

On 16 June 2022, the Australian Cyber Security Centre (ACSC) notified ACL that dark web monitoring had identified Medlab data, including personal information, health information, and credit card details, had been published on the dark web. Despite the initial forensic investigation identifying no evidence of data exfiltration, it appeared that approximately 86GB of data had been stolen and published. This impacted dataset included personal information of more than 223,000 individuals. ACL subsequently notified the OAIC of the incident on 10 July 2022. 

The OAIC's case and the proceedings

Decision

Implications

If you have any questions, please get in touch with Hall & Wilcox’s market-leading cyber and privacy teams to discuss how these changes are likely to impact you or your business.

This article was written with the assistance of Daniel Williams and Charlotte van de Poll.

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