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Bank secrecy (or bank privacy) is a legal principle in some jurisdictions under which banks are not allowed to provide to authorities personal and account information about their customers unless certain conditions apply (for example, a criminal complaint has been filed〔But in some jurisdictions simple failure to declare revenue to tax authorities is not a criminal offense, so a bank would not generally be required to disclose information regarding tax evasion.〕). In some cases, additional privacy is provided to beneficial owners through the use of numbered bank accounts or otherwise. Bank secrecy is prevalent in certain countries such as Switzerland, Lebanon, Singapore and Luxembourg, as well as offshore banks and other tax havens under voluntary or statutory privacy provisions. Created by the ''Swiss Banking Act of 1934'', which led to the famous Swiss bank numbered account, the principle of bank secrecy is always considered one of the main aspects of private banking. It has also been accused by NGOs and governments of being one of the main instruments of underground economy and organized crime, in particular following the class action suit against the Vatican Bank in the 1990s, the Clearstream scandal and the terrorist attacks of September 11, 2001. Former bank employees from banks in Switzerland (UBS, Julius Baer) and Liechtenstein (LGT Group) have testified that their former institutions helped clients evade billions of dollars in taxes by routing money through offshore havens in the Caribbean and Switzerland. One of these, Rudolf M. Elmer, wrote, "It is a global problem...Offshore tax evasion is the biggest theft among societies and neighbor states in this world."〔Browning, Lynnley. (Swiss Banker Blows Whistle on Tax Evasion. ) ''New York Times'', January 18, 2010.〕 The Swiss Parliament ratified on June 17, 2010 an agreement between the Swiss and the United States governments allowing UBS to transmit to the US authorities information concerning 4,450 American clients of UBS suspected of tax evasion.〔http://www.tsr.ch/info/suisse/2123331-l-accord-ubs-est-accepte-definitivement.html〕〔That agreement had been challenged in the Swiss courts, forcing the Parliamentary vote. It had initially been rejected by the lower house, see (Jolly, D. Swiss Lawmakers Reject UBS Tax Deal. ), but was subsequently accepted by both houses, see ()〕 Advances in financial cryptography (e.g. public-key cryptography) could make it possible to use anonymous electronic money and anonymous digital bearer certificates for financial privacy and anonymous Internet banking, given enabling institutions (e.g. issuers of such certificates and digital cash) and secure computer systems. ==Swiss Banking Act of 1934== (詳細はFederal Act on Banks and Savings Banks'' (''Swiss Banking Act of 1934'') following a public scandal in France, when MP Fabien Albertin denounced tax evasion by eminent French personalities, including politicians, judges, industrialists, church dignitaries and directors of newspapers, who were hiding their money in Switzerland. He called these men of "a particularly ticklish patriotism", who "probably are unaware that the money they deposit abroad is lent by Switzerland to Germany". The Peugeot brothers and François Coty, of the famous perfume family, were on his list. Since then, Swiss banks have acquired worldwide celebrity due to their numbered bank accounts, which critics such as ATTAC NGO alleged only help legalized tax evasion, money laundering and more generally the underground economy. Under the Swiss principle of bank secrecy, privacy is statutorily enforced, with Swiss law strictly limiting any information shared with third parties, including tax authorities, foreign governments or even Swiss authorities, except when requested by a Swiss judge's subpoena . However banking is not strictly anonymous since under its banking law all Swiss bank accounts, including numbered bank accounts, are linked to an identified individual. This law only permits a bank to share information with others in cases of severe criminal acts, such as identifying a terrorist's bank account or tax fraud, but not simple non-reporting of taxable income (called tax evasion in Switzerland). In April 2013, French Minister Jérôme Cahuzac was forced to resign when the Geneva public prosecutor, acting quickly on a French request related to tax fraud, found evidence of undeclared Swiss accounts. Under pressure from the G20 and the OECD, the Swiss government announced in March 2009 that it will abolish the distinction between tax fraud and tax evasion in dealings with foreign clients. The distinction remains valid for domestic clients. Any bank employee violating a client's privacy could be punished quite severely by law. After signing 12 new double taxation treaties in accordance with the international standard set by the OECD, Switzerland was removed from the grey list of non-compliant tax jurisdictions. In October 2013, the Swiss government stated that it intended to sign an international agreement sponsored by the OECD that, if ratified by Parliament, will align Swiss bank practices with those of other countries and in effect end the special secrecy that clients of Swiss banks had enjoyed in the past. After the revelations of whistleblower Bradley Birkenfeld in 2007, UBS was caught red-handed by the United States government offering tax evasion strategies, sending undercover bankers with encrypted computers to the United States. After it was caught, UBS paid a $780 million penalty and handed over hundreds of client files to American authorities.〔"UBS exec indicted in tax evasion scheme." The Recorder (2008). General Reference Center Gold. Web. 17 June 2010.〕〔(Still Waiting for Those Names. New York Times. June 16, 2010. )〕 In 2010, the Swiss and the United States governments negotiated an agreement allowing Swiss bank UBS to transmit to the US authorities information concerning 4,450 American clients of UBS suspected of tax evasion.〔〔That agreement was ratified by the Swiss parliament, despite some resistance due both to opposition in principle and to political maneuvering related to other proposals, such as the taxation of executive bonuses, see ().〕 In the aftermath of the UBS and Julius Baer banking cases, some wealthy clients who continue to use offshore accounts are turning to private banks in Singapore and Hong Kong. In addition to the local Singapore or Hong Kong banks, offices have been opened in those localities by a number of Swiss private banks.〔Paul Sullivan, ("Hiding Money Overseas? Your're taking a Big Chance ), "The New York Times", February 5, 2011]〕 The move to Singapore and Hong Kong is an alternative to the banking secrecy that Swiss banks have come under attack for. Singapore has bank secrecy provisions comparable to those in Switzerland. Although Hong Kong does not have the same bank privacy laws, it offers flexibility in the creation of opaque companies that can serve as tax conduits.〔Browning, Lynnley, ("Seeking Bank Secrecy in Asia" ) "The New York Times", September 22, 2010.〕 Many offshore banks, located in tax havens such as in the Cayman Islands and Panama, also have strict privacy laws. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bank secrecy」の詳細全文を読む スポンサード リンク
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