Company Office documents confirm Christian Hoff-Nielsen has registered a bike hire company, Woohoo Trading, with him listed as the sole director and shareholder.
Allegations were made against Hoff-Nielsen's former business that migrant workers were owed wages and there had been breaches of visa conditions.
The party suspended her in March this year and hired a lawyer to investigate, whose report said the MP changed her evidence during the course of the inquiry, and Hoff-Neilsen's evidence tended to obfuscate rather than elucidate the issues.
She left the Green Party but refused to quit as an MP until the Greens invoked the waka-jumping legislation last week.
Tana's removal as an MP was confirmed by the Speaker this week.
Hoff-Nielsen's previous bike business went into voluntary liquidation in July owing $413,000, including $133,000 to Inland Revenue.