U.S. authorities are ratcheting up pressure on Credit Suisse (CSGN.VX) to plead guilty to helping wealthy Americans hide untaxed money in Swiss bank accounts, Swiss newspaper NZZ am Sonntag said. The source quoted by the newspaper said U.S. authorities had made “extreme” demands regarding potential fines and wanted the names of all U.S. citizens who had stashed away untaxed money in Credit Suisse accounts, NZZ am Sonntag said. Credit Suisse is one of over a dozen Swiss banks under criminal investigation in the United States over whether and how they helped wealthy Americans dodge tax.