The National Party says its candidate for the Manukau East electorate has given assurances he received no financial gain from a payment made by an Indian woman to an immigration consultancy firm.
The Department of Labour is looking into an allegation that property developer Kanwaljit Bakshi offered someone a job in exchange for $22,000.
A National Party spokesperson says Mr Bakshi offered the woman a job in good faith after being approached by an immigration consultancy.
But the woman's application was declined by immigration officials and the spokesperson says there is now a dispute between her and the firm.
He said there was no commercial transaction between Mr Bakshi and the applicant.
Mr Bakshi has not returned calls from Radio New Zealand.
A Labour Department spokesperson said the allegation about Mr Bakshi was received on Friday afternoon, and the department would be assessing it, but there was no investigation at this stage.