500 South Sudan Pounds

South Sudan's 500 Pounds denomination was introduced as the highest face value in the series, a direct consequence of the hyperinflationary pressure that has eroded the South Sudanese Pound since independence in 2011. By the mid-2020s, the currency had lost the overwhelming majority of its value against the US dollar, making large-denomination notes a practical necessity rather than a prestige issue.

P#20 is among the first notes issued by the Bank of South Sudan to incorporate colour-shifting ink — a security upgrade notably absent from earlier high-value issues in the series.