US tax authorities have awarded $104m (£65m) to an ex-banker who supplied details about overseas tax cheats. Bradley Birkenfeld is said to have exposed tax evasion at UBS AG, a prominent Swiss bank, passing details to the US officials probing the bank. In 2009, the bank paid a $780m fine in the case and agreed to turn over the names of thousands of Americans suspected of cheating on their taxes. Birkenfeld also served prison time for fraud conspiracy in the same case. The Internal Revenue Service (IRS) confirmed on Tuesday that it had paid an unprecendented reward. "The IRS today sent 104 million messages ... (full story)