The group studied Greenpeace's document published in July, How Sinar Mas is Pulping the Planet.

It alleged Greenpeace had been caught "using false and misleading information to attack the credibility of a company to advance its agenda".

It said the evidence showed Greenpeace "provided quotes that don't exist", and used source material "with high margins of error that was cited as absolute fact".

Oxley said: "A careful examination of the evidence shows that the Greenpeace report is highly misleading and simply not defensible.

"The claim about a secret massive company expansion in Indonesia is based on fiction. And the information supporting the allegation that the company is engaging in illegal forestry on peatland is either groundless or seriously in error."

However, Greenpeace has hit back at the allegations and questioned the independence of the report's author as it claimed ITS Global had been hired as an auditor by APP.

It said Oxley also heads up World Growth International, a group that it said lobbies on behalf of and regularly represents logging industry interests.

Bustar Maitar, Greenpeace Indonesia forest campaigner, said: "Sinar Mas is getting increasingly desperate as it tries to cover up its continued role in rainforest destruction. It seems anyone with any level of credibility is no longer willing to work with the group."

Greenpeace said the ITS Global audit used outdated concessions maps and failed to use the correct documents which explain the company's expansion plans.

PrintWeek has secured an exclusive interview with APP's Aida Greenbury, director, sustainability and stakeholder engagement. The interview will be broadcast as a live webcast on 13 October. To participate in the live debate and put your questions to Greenbury on this and other issues register at www.printweek.com/webcasts.