Uber is under attack from the New Zealand Transport Agency, which warns its drivers they face fines if they don't operate within the law.
The app-based operation is also facing an internal revolt with existing drivers complaining new fares make it hard to run at a profit.
Last week, the international transport app announced it would cut fares 20 per cent and slash the cost of becoming a driver from up to $2000 to $20, which will take just six days via a third party company.
Uber's director of policy in Australia and New Zealand, Brad Kitschke, said the app was now offering a "ride-share" service so its drivers did not need professional licences.
"The product that we've had thus far in New Zealand has not been a ride-sharing service, it's been licensed professional drivers, but the ride-sharing service that we're now offering is everyday people ... [who] have undergone all the appropriate screening processes that we've put them through and are able to operate one day a week ... because the barriers for entry are low enough that they're now able to operate in that way."