Former MP Taito Phillip Field has filed papers in the Supreme Court in a final effort to have his convictions for bribery and corruption overturned.
Field was sentenced to prison for six years in 2009 after being found guilty of 11 charges of bribery and corruption and 15 of attempting to pervert the course of justice.
The charges were laid after he accepted labour from Thai people he helped with immigration matters and then tried to cover that up during an official inquiry.
He was the first politician in New Zealand to be convicted of corruption.
Last year, the Court of Appeal dismissed his appeal against conviction and sentence.
The Supreme Court says it is not yet known when the application will be heard.