Tournier v National Provincial and Union Bank of England

Tournier v. National Provincial and Union Bank of England was a landmark 1924 legal case in the United Kingdom. It established the conditions under which banks owed confidentiality to their clients, allowing four circumstances wherein banks were not required to guard privacy: where compelled by (1) law, (2) public duty, (3) the interest of the bank, or (4) where the client had consented, even implicitly, to disclosure.