UBS Group AG, Switzerland's largest bank, announced it will not release privileged documents related to Nazi-linked accounts to investigator Neil Barofsky. This decision follows a ruling by a New York judge, who stated that UBS could not be guaranteed protection from future lawsuits if it disclosed the documents. UBS had considered sharing the files, which are part of a probe into Credit Suisse's handling of such accounts, but reversed course after the court's decision. UBS acquired Credit Suisse in 2023, taking on its legal challenges, including this ongoing investigation. Barofsky emphasized that the withheld documents are critical to his inquiry, which has already uncovered hundreds of leads related to Nazi-linked accounts. The situation may escalate into the political arena, with US Senate committee members expressing frustration over UBS's refusal to cooperate, potentially leading to further hearings. UBS maintains that it is not withholding historical documents from before the 1990s, despite the ongoing legal complexities surrounding the 1999 Settlement Agreement, which required Swiss banks to pay $1.25 billion to Holocaust survivors and their families.