Prepared by UBS after a global review to assess the timeline of regulatory approvals necessary for the integration of Credit Suisse to complete, the document said uncooperative regulators could put transactions such as the Swiss bank deal at risk. The document says that "a single non-cooperative regulator can jeopardise the timeline of the parent bank merger and other transactions", affecting other related integration deals. The uncertainties could lead to winding down businesses and asset sales, when UBS faces "difficult jurisdictions or regulators", the Swiss bank said in the document. Credit Suisse, which was Switzerland's second-biggest bank, suffered years of scandals and losses before it had to be rescued in March in a state-engineered takeover by UBS. Although UBS completed the takeover in June, it still needs approvals from regulators in markets where both the banks operate for the legal completion of the first rescue of a global bank since the 2008 financial crisis. Credit Suisse declined to comment.