Most ACC clients who complain about their treatment by the accident insurer believe their grievances have been handled poorly by the corporation, an Auditor-General's report has found.
Auditor-General Lyn Provost's report yesterday on ACC's complaint handling process found more than 60 per cent of those who complained were unhappy with their treatment while little more than 20 per cent were happy.
That represented a steep deterioration on numbers in 2008 when fewer than half were dissatisfied with the way their complaint was handled.
While complaints to ACC have declined from about 2200 in 2011/12 to 1400 in 2013/14, Ms Provost said that may be because thousands of dissatisfied claimants were deciding against complaining because they believed it was of little use.
She noted that in 2012/13, research suggested 16 per cent or about 200,000 of those who had a claim accepted by ACC said they were dissatisfied with their service from the corporation. However, only about 1600 complaints were recorded that year.