In 1931, Jersey, like the rest of the British Isles, was profoundly affected by the global financial crisis and the UK's decision to abandon the gold standard. As a Crown Dependency with its own ancient legislative powers, Jersey did not automatically follow UK currency law, but its economy was deeply intertwined with Britain's. The island's banking system held substantial reserves in sterling, and its primary export, agriculture, depended on the British market. Consequently, the devaluation of sterling in September 1931 created immediate uncertainty, threatening the value of Jersey's reserves and the stability of its local banks.
The States of Jersey moved swiftly to assert control and prevent a banking collapse. On 29 September 1931, just days after the UK's suspension of gold convertibility, the States passed the "Currency Notes (Jersey) Law". This critical legislation authorized the issuance of distinct, island-specific currency notes, which were to be backed not by gold but by sterling securities held in a dedicated fund. This created a de facto Jersey pound, pegged at par with sterling, but legally a separate issue. The move was a defensive measure to localize and secure the island's currency supply, ensuring that notes in circulation were fully backed by assets under the direct control of the Jersey government.
The outcome was a period of monetary stability during a time of international turmoil. The new Jersey notes successfully maintained public confidence, prevented a run on local banks, and allowed commerce to continue smoothly. This episode reinforced Jersey's constitutional autonomy in domestic affairs, particularly in finance, while also cementing its practical economic reliance on sterling. The system established in the crisis of 1931 formed the bedrock of Jersey's modern currency system, where locally issued notes circulate alongside UK coinage, a direct legacy of the decisive actions taken that year.