20 Pesos

The Tesorería de la Provincia de Buenos Aires issued these provincial notes as a direct consequence of Argentina's 2001–2002 financial collapse, when the federal government froze bank deposits under the corralito and the country effectively ran out of circulating currency. Buenos Aires Province, like several others, began printing its own quasi-currency — the Patacón — to pay public employees and meet obligations the federal peso system could no longer handle. These notes were legal tender within the province but not nationally, creating a patchwork monetary reality across Argentina that persisted into the mid-2000s.

The 2006 date places this issue late in the Patacón's life, well after the acute crisis had passed — likely a final administrative emission or redemption-phase printing rather than active wage-payment stock.