Former accountant Graham McCready has Auckland Mayor Len Brown in his sights for his next legal endeavour and plans to file papers against him next week for corruption and filing a false electoral return.
"I think there's a case there and I think it's a very important case and should be filed," he said.
The action relates to nearly $40,000 worth of free rooms and hotel upgrades Mr Brown failed to declare to the Auckland City Council and $750,000 donations to Mr Brown's last two local body elections through a trust the New Auckland Council Trust.
The action is the same Mr McCready successfully filed against Act leader John Banks, who will now be facing a trial in May accused of failing to declare donations.
Mr McCready would be filing the papers through an Auckland associate, former police prosecutor Grace Haden, he said.