The yellow and green note, which is worth around $35, came into circulation last October. It has multiple security features -- including microprint of a speech by Australia's first female parliamentarian, Edith Cowan.
But the technology seemingly did not include a spellchecker.
It took seven months for the public to notice "responsibility" was repeatedly misspelt in the text of Cowan's 1921 maiden speech.
"I stand here today in the unique position of being the first woman in an Australian parliament. It is a great responsibilty," the text reads, missing an "i".
But there are no plans to pull the notes from circulation.
Edith Cowan played a crucial role in winning the vote for women in Western Australia and at the age of 60 entered parliament. There she was instrumental in opening the legal and other professions to women.