Complex sentence: Today, the "Birds of Canada" banknotes are relatively easy to counterfeit with inkjet printers, and it and the original Canadian Journey Series are the most commonly counterfeited banknote series because of their lack of modern security features.
Split into simpler sentences: Today, the "Birds of Canada" banknotes are relatively easy to counterfeit with inkjet printers. The Birds series and the original Canadian Journey Series are the most commonly counterfeited Canadian banknote series because of their lack of modern security features.