Every bank does it

Standard Chartered Bank is being penalized by New York for dealing with Iran. This article said that other banks are doing the same.

http://finance.fortune.cnn.com/2012/08/08/iran-standard-chartered/?section=money_topstories&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2Fmoney_topstories+%28Top+Stories%29