A former Chorus subcontractor has been forced to pay more than $50,000 in penalties and wage arrears following a Labour inspectorate investigation.
Sunwin Technologies had been using unpaid volunteers to carry out fibre installation work, sparking the investigation in December 2017.
The ruling follows a $73,000 fine for another Chorus subcontractor, Clearvision, in May.
Chorus has now blacklisted a total of 38 subcontractors who were caught up in a sweeping Labour Inspectorate and Immigration NZ investigation late last year, which found 70 of 72 companies investigated were "systematically" breaching labour laws.
Sunwin and Clearvision are among those who were blacklisted.