The Inspector said HB Seafoods, which operated as a catch, processing, retailing and export operation with more than 200 staff, failed to keep records for the six crew as required by Holidays and Employment Relations acts.
The company, represented in the proceedings by Napier accountant Rod De Terte, denied the breaches.
But the authority's Michelle Ryan determined the company's records were deficient, with multiple inaccuracies and omissions.
The company had been unable to explain the deficiencies, she said, adding its position was untenable.
She found nine separate and ongoing omissions or failures, involving 41 breaches, and believed that the company's approach to the provision of records seriously hampered the inspector's ability to investigate the situation of what were regarded as "vulnerable migrant workers."
She said the harm caused as a result of the recording failures meant crew were deprived of financial entitlements and the sum of money owed to individual crew would likely be significant to each of them.