For your reading pleasure: http://www.investmentexecutive.com/-/news-26007 http://otcshortreport.com/faq http://www.iiroc.ca/industry/rulebook/Documents/UMIR0202_en.pdf http://books.google.com/books?id=9cPFWqm-muYC&pg=SA7-PA95&lpg=SA7-PA95&dq=double+printing+securities&source=bl&ots=jcB65LuJ8R&sig=z-_KlDkOTrSo-x44z-wZL-Akeu4&hl=en&sa=X&ei=4PBiUKqnIIPu9AT-iYGwCQ&ved=0CD0Q6AEwATgK#v=onepage&q=double%20printing%20securities&f=false http://apps.americanbar.org/buslaw/blt/content/2010/11/0004a.pdf