Mr Su was issued with an Improvement Notice requesting records, so his compliance with employment laws could be assessed.
By February this year Mr Su had not provided the records, despite repeated attempts by the labour inspector to obtain them. The Labour Inspectorate filed action with the Employment Relations Authority.
In a determination issued last week, the Employment Relations Authority said Mr Su's refusal to supply records left the labour inspector with "real concern" there was no evidence the employment rights of Mr Su's employees were being upheld.
Approached by Hawke's Bay Today, Mr Su said he wasn't aware of the $5000 penalty but would refer the matter to his lawyer.
Mr Su had just one employee, a young woman who Hawke's Bay Today saw working behind the counter.
He said he paid his employee a wage.