However, the ERA found the company broke the Wage Protection Act 1983, which bans any deductions from employee wages that have not been requested or authorised in writing. It said a clause in her unsigned employment agreement did not count as written consent.
The ERA also found Traffic Management NZ had not filed an insurance claim for the damage to the truck, and could not provide details of the work done to repair the vehicle, saying there "is no corroborating evidence of the reasonableness of the charges."
The company said it knew the insurance claim would be declined because Ms Hepi was under the influence of drugs. But the ERA ruled it could not claim damages from Ms Hepi until it had filed an insurance claim and received an outcome.
It ordered the company to pay back $3,915.55 deducted from Ms Hepi's wages, plus interest at seven per cent from October 9, 2012 until the date of payment.
The company was also ordered to pay a penalty of $1000 to "mitigate the losses and hardship suffered" by Ms Hepi.