The Electoral Commission will not investigate Donghua Liu's alleged donations to the Labour unless a complaint is laid.
The millionaire businessman said he gave "equally" to both National and Labour and a signed statement emerged which said he paid "close to" $100,000 for wine at an auction fundraiser in 2007. The Herald has also been told he paid $15,000 for a book signed by Helen Clark, the prime minister at the time.
The statement also said Liu paid $50,000 for a boat cruise up the Yangtze River on which Rick Barker, a Labour Cabinet minister at the time, was a guest.
The Labour Party has said there are no records of the donations and challenged Liu to provide evidence, but the stand-off has prompted calls for an independent inquiry.
A spokesman for the Electoral Commission said it had so far received no complaint "and has been provided with no information in relation to the alleged donations".
