Abstract In the early twentieth century, like many of their European counterparts, labour unions in the Netherlands established mutual unemployment insurance funds for their members. Various funds made agreements with labour unions in a number of European countries to recognize each other's insurance schemes, enabling union members to work in the Netherlands without losing their entitlement to benefits accumulated in their home countries, and vice versa. Whereas up until the 1930s some of the alliances between Dutch and foreign funds had flourished, in the 1930s the number of non-Dutch workers in the Netherlands making use of such agreements decreased drastically. This article analyses those transnational alliances and explores various causes for their demise, concluding that in the 1930s formal regulation of foreign labour by the Dutch government substantially reduced the number of potential foreign members of insurance funds while government interference in unemployment insurance abroad, and especially in Germany, made the transnational agreements effectively void.