A magazine editor in Greece was arrested on Sunday after publishing a list of 2059 people who have accounts with the HSBC bank in Switzerland. Kostas Vaxevanis is charged with breach of privacy.
Police said a prosecutor ordered the arrest on Saturday and he was arrested on Sunday.
Mr Vaxevanis said the list he published is the same one that was given by former French finance minister Christine Lagarde to her Greek counterpart. It is known as the 'Lagarde list'.
Some of those named are suspected of using the accounts for tax evasion.
The list was originally leaked by an HSBC employee and then given by Ms Lagarde to Greek agencies two years ago, but they did not investigate.
Ms Lagarde is now managing director of the International Monetary Fund.
The BBC reports Mr Vaxevanis, 46, is due in court on Monday to answer the charges.