Supporters of Waikato Tainui parliament chair Tania Martin have released a letter from the police exonerating her of financial mismanagement.
The police corporate fraud unit in Waikato looked at allegations that some payments, including one of $8800, were made wrongfully.
In his letter, Detective Simon Eckersley says while there is no proof the money was refunded, it probably was, and it is too late to settle it now.
He dismisses other allegations, including that housie sessions at a marae were mismanaged.
The investigation is the latest chapter in a series of battles between Mrs Martin and the tribal executive led by Tukoroirangi Morgan.
Mrs Martin was also embroiled in a row with the Maori King, who tried to sack her but was thwarted by a parliamentary vote.