50 Pesos

Provincial treasury notes of this kind reappeared in Argentina during the 2001–2002 convertibility collapse, when the federal government's freeze on bank deposits — the infamous "corralito" — left provincial administrations unable to meet payroll and basic expenditure obligations. Buenos Aires Province, like a dozen others, responded by issuing quasi-currency backed by its own tax receivables. These notes circulated alongside federal pesos and the better-known national-level "Lecop" instruments, accepted at parity for provincial transactions and tolerated, uneasily, by private retailers.

A 2006 date on a note of this type places it in the tail end of that emergency framework — most provinces had wound down their parallel currencies by 2003–2004, making later-dated Buenos Aires examples the less typical survivors of a system that had already outlived its political justification.