According to information gathered by Inside Paradeplatz, Edgar Paltzer helped US clients evade taxes via Interhold, a structure linked to the renowned Niederer Kraft & Frey practice based in Zuerich. Structures were built for rich clients.

Edgar Paltzer has been cooperating with the US since August 2013 which has led to criminal charges against more than 100 people, including about 70 American taxpayers and more than 30 bankers, lawyers and advisers.