ACC is being accused of another mass privacy breach, while it is already under investigation for sending information on thousands of claimants to Auckland woman Bronwyn Pullar last year.
A member of an online ACC claimants' discussion group ACCforum posted this week that they had requested their "IT Sweep" - a record of all documentation that ACC holds about their claims - and received "a list of names regarding review dates and reason for review and claim numbers".
ACC's privacy officer, Miriama Henderson, responded on the ACCforum telling the person that if they'd received information about other clients, ACC needed to recover the information so it could contact those clients.
"We'll also advise the Office of the Privacy Commissioner of any breach," she wrote.
The New Zealand Herald reported that an ACC spokeswoman confirmed the corporation was investigating the potential breach, but had been unable to identify the claimant.
The Auditor-General's office and private auditors are investigating how information about 6700 claimants was sent to Ms Pullar.
KPMG auditors and Integrity Solutions, led by former Australian federal privacy commissioner Malcolm Crompton, are due to report to the Privacy Commissioner and the ACC board on August 23.
ACC's chairman, chief executive and three board members have resigned in the fallout of New Zealand's biggest privacy breach.
Cabinet minister Nick Smith also resigned his portfolios over a conflict of interest after it was revealed he supported Ms Pullar in her compensation claim case.
NZN