The Crown is appealing the decision in the NZ First Foundation case which saw two men charged over the donations to the party found not guilty.
In a statement just released, Crown Law says it has filed a notice with the Court of Appeal.
The pair were on trial in the High Court in Auckland, accused by the Serious Fraud Office of obtaining nearly $750,000 by deception between 2015 and 2020.
They denied deceiving the New Zealand First Party by collecting and spending money the Crown argued should have been treated as donations - with reporting obligations.
The names of the two men are suppressed.