Kim Dotcom has been served with papers to appear in court and give evidence in a private prosecution against Act Party leader John Banks over donations he received during his failed 2010 mayoral campaign.
Mr Dotcom's bodyguard Wayne Tempero, lawyer Greg Towers and Sky Tower chief executive Nigel Morrison have also been served.
Mr Banks is facing a private prosecution by retired accountant Graham McCready who alleges the MP knowingly received donations from Mr Dotcom but recorded them as anonymous.
In May, Mr Banks pleaded not guilty to allegations relating to the donations.
Mr McCready is bringing the private prosecution against Banks after police concluded last year they could not prove he had made a false return.
The hearing will take place at the Auckland District Court on October 14 and 15. A secret witness whose details are suppressed will be appearing for Mr Banks.
The hearing is to establish whether a prima facie case against Mr Banks exists. If he is committed for trial it would be held about June 2014.