Chinese businessman Donghua Liu spent more than $150,000 on the previous Labour government, including $100,000 on a bottle of wine signed by former prime minister Helen Clark at a party fundraiser, the NZ Herald has revealed.
Last week, Labour leader David Cunliffe faced controversy after he said he had never met or advocated for Mr Liu.
Just a day later, an 11-year-old letter emerged that Mr Cunliffe had written in support of the controversial millionaire immigrant.
It was also revealed Mr Liu had donated $15,000 to Labour.
After the letter came to light, Prime Minister John Key said he would be "very, very amazed" if details of a larger donation did not emerge.
Labour general secretary Tim Barnett released a statement saying "In response to media reports, Party staff have looked through the 2007 records today, and found no record of donations in the name of Donghua Liu."