The Canadian $20 note is one of the most common banknotes of the Canadian dollar; it is the primary banknote dispensed from Canadian automatic teller machines (ATMs). The newest version, the Frontier Series polymer note, was released to the general public on November 7, 2012, replacing the banknote from the Canadian Journey Series. Present note The present $20 banknote was first issued on November 7, 2012. It is a polymer-based note featuring Queen Elizabeth II on the face and the Vimy Ridge memorial on the back. The window displays the Peace Tower. On January 18, 2013, a Canadian botanist complained that a foreign maple leaf was used as the emblem on the polymer notes instead of the sugar maple that the country has on its national flag, along with the $50 and $100 notes. After the death of Elizabeth II, the banknotes with her image will continue to be legal tender. It is undecided whether they will be replaced in circulation with notes bearing an image of her successor Charles III in a future redesign. History The Canadian 20 dollar bill is one of the denominations of Canadian currency. The first 20 dollar bill was issued in 1935, and featured a portrait of Princess Elizabeth on the front and an agricultural allegory on the back. It featured a kneeling male exhibiting the produce of the field to a female agricultural figure. All Canadian banknotes underwent a major redesign in 1991, partially to incorporate some of the latest anti-forgery methods. Notes continue to be improved, with another design revealed on August 25, 2004, and placed into circulation on September 29, 2004. Notes were printed on paper composed of pure cotton at two Ottawa companies contracted for the purpose: the Canadian Bank Note Company and BA International Inc., a part of the Giesecke & Devrient GmbH group of companies. Each note in the 1991 series is sprinkled with special green ink dots, called planchettes, that glow when exposed to ultraviolet light. The ink can be scraped off, so worn notes tend to have fewer, if any, glowing dots. These were replaced with more permanent ultraviolet-detected threads in the new notes, as well as an ink imprint of the coat of arms. Canadian Journey Series Introduced in 2004 and circulated until its replacement in 2012, the Canadian Journey Series 20-dollar note is predominantly green. The face features a portrait of Elizabeth II, Queen