The zero currency note in a country’s currency is a tool to help to achive the goal of zero corruption. The note is a way for any human being to say NO to corruption without the fear of facing an encounter with persons in authority.
Next time someone asks you for a bribe, just take your country’s zero currency note and hand it to them. This will let the other person know that you refuse to give or take any money in order to perform services required by law or to give or take money to do something illegal.
read all about it here: http://blogs.worldbank.org/publicsphere/paying-zero-public-services
and here http://zerocurrency.org/
Thanks Max Niederhofer for pointing me to it!