Falciani, who refused to appear for trial in Switzerland, has been charged of industrial espionage.
According to Swiss news agency ATS, Falciani has been sentenced in absentia to five years in prison.
A former employee of global banking major HSBC, Falciani leaked details of bank account holders in Geneva branch of HSBC - a list which later reached the French government and subsequently was shared with India as it had accounts of those Indians who had stashed funds abroad.
About the sentencing, Falciani told Indian television channel NDTV that nothing has changed and it should not affect his collaboration with Indian authorities. He also told the channel that he would make an appeal to European Human Rights Court.
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Meanwhile, HSBC today announced shutting down of its private banking business in India that offers wealth management services.
The bank's private banking division has been mired in the black money probe after it was revealed during investigation by global journalists' collective ICIJ that more than 1,000 Indians had parked USD 4 billion in HSBC Geneva till 2007.
Addressing media persons through Skype link on November 2, Falciani said money was not the driving force for sharing classified data on black money and other suspect accounts.
"We are not protected... If I am coming to India, I will be arrested," he had said, adding that people need to understand that there are not many new ways to probe and combat the menace of black money.