HSBC, the world's second largest bank, helped some of the richest people in the world stash away billions in assets to avoid taxes. The Swiss arm of the British banking giant encouraged wealthy clients to hide their fortunes from governments and other taxing authorities and helped to make their transactions untraceable.
source http://www.thetyee.ca/News/2015/02/11/HSBC-Helped-Rich-Hide/
source http://www.thetyee.ca/News/2015/02/11/HSBC-Helped-Rich-Hide/