10 000 000 000 000 Dollars

By the time this note entered circulation in 2008, Zimbabwe's inflation rate had long since passed any meaningful statistical threshold — the Reserve Bank of Zimbabwe eventually stopped publishing official figures when annual inflation exceeded 230 million percent. Ten trillion dollars bought a loaf of bread, briefly, before that price doubled again within days. Fidelity Printers and Refiners, the state-controlled security printer in Harare, was producing denominations faster than the ink could dry, and the colour-shifting ink and security thread were almost absurd inclusions on a note that would be economically worthless within a week of issue.

The series was demonetized in 2009 when Zimbabwe abandoned the dollar entirely in favour of foreign currency.