The former UBS Group AG banker whose cooperation with the U.S. helped expose tax evasion by thousands of Americans says the Swiss bank used similar practices elsewhere and he’s eager to help European governments.

“It’s not a U.S. issue, it’s not a French issue, it’s a global issue. UBS is the problem,” Bradley Birkenfeld said in an interview the day after testifying in a French investigation into similar allegations against UBS. “They’ve been doing it in every market: the Greek market, the Spanish market, the Italian market, the Scandinavian market, the German -- I can go on and on, you get the picture.”

The French charged the world’s largest manager of money for the rich last year with laundering the proceeds of tax fraud and ordered the Zurich-based bank to pay 1.1 billion euros ($1.2 billion) to cover a potential penalty should the criminal probe result in a guilty finding. The judge leading the probe asked Birkenfeld to come to Paris to testify as a witness, according to a U.S. court decision authorizing the trip.

Birkenfeld’s testimony in the U.S. case helped secure a $780 million settlement with the bank in 2009. He went to prison for his role and is still on probation. In the interview with Bloomberg News, he said that during his years at UBS in Switzerland, he often spoke with colleagues who worked with French clients and understands how they operated.

French Probe

“A witness who actively lobbied to get invited, needed to receive special permission to travel due to his court-ordered supervisory release, and never worked in the business in question, should have limited credibility,” UBS said in an e- mailed statement.

On the French case, the bank said, “the matter remains in a formal investigation phase, there is nothing more to add at this point.” Previously, the bank said the French probe has become a “highly politicized process” and that it’s “taken significant and broad steps to ensure tax compliance of our clients and will continue to do so.”

The U.S.-born banker flew to Paris last week and met with investigators led by judge Guillaume Daieff on Feb. 27, he said. In an interview the next day at a hotel near the Arc de Triomphe, Birkenfeld recounted his time at UBS in Switzerland, where he worked from 2001 to 2006. He declined to go into specifics about the judges’ questions.

‘Boys’ Club’

He was part of a team that catered to 19,000 U.S. wealthy clients with about $20 billion in assets, he said. As a director, Birkenfeld said he “made good money for the bank and my clients” during his years at UBS.

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