Teina Pora has filed proceedings asking the court to review the Government's decision not to add inflation to $2.5 million compensation paid to him for wrongful imprisonment.
His team advised today that an application for a judicial review has been filed in the High Court in Wellington.
In June, Cabinet agreed to pay compensation to Pora, who spent nearly 22 years in prison.
On the advice of retired High Court judge Rodney Hansen, QC, a lump sum was paid.
Hansen advised that an additional amount to take effect for inflation should be considered and that not to do so would be anomalous and unjust.