The Bank of Canada will start issuing high-tech currency made of polymers instead of the traditional cotton paper and featuring transparent windows (one shaped like a maple leaf) to frustrate counterfeiters.
Security and verification features include raised ink in the numerals and the featured portrait, color-shifting images embedded in the large window, and a number hidden in the maple-leaf window.
![](http://i2.cdn.turner.com/cnn/2011/images/06/21/t1larg.canada.peek.boc.jpg)