"So before we get into incrimination by insinuation I think people should go and have a look at that database, make sure they understand it carefully and make sure they understand what is happening in New Zealand."
However, Mr Key's example may backfire. Greenpeace and Amnesty were both mentioned in an earlier 2013 leak when it was reported the charities' names had been used as beneficiaries without their knowledge or consent by people using the front of a charity to hide the true identity of the beneficiaries. Naming a charity as a beneficiary reduced the disclosure requirements for a trust.
He said New Zealand was mentioned 11,000 times over 40 years - .2 per cent of the files.
In Parliament, Mr Key also alleged Green MP Mojo Mathers had a foreign trust - a reference to her beneficial interest in the UK Lamledra Trust. Ms Mathers gave a personal statement, to clarify that was a UK-based family trust but was not a foreign trust.
Mr Key has had to to defend Ken Whitney, who looks after Key's own trust, because Mr Whitney was in the documents in his capacity as a director of Rothschild Trust NZ, a role he held until August last year. Mr Whitney had previously said he was not involved with Mossack Fonseca and Mr Key said the link was "tenuous."
"I don't think anyone should jump to conclusions because someone is a director or trustee of some company in New Zealand that through a massive association has somehow dealt with Mossack Fonseca that they have done something wrong."
Mr Key also downplayed the links between Mossack Fonseca and several of the trust lawyers who lobbied the Government about Inland Revenue's proposed review of foreign trust law in 2014.
"Here's breaking news. People who work in an industry might want to talk to the Government about that."
The International Consortium of Investigative Journalists database which was released this morning carries a 'disclaimer' that says there are "legitimate uses for offshore companies and trusts. We do not intend to suggest or imply that any persons, companies or other entities included in the ICIJ Offshore Leaks Database have broken the law or otherwise acted improperly."