Аннотация:The collapse of the three empires governing divided Poland after the First World War left thousands of imperial civil servants out of work and forced to recalibrate their political affiliations. Those who did not flee with retreating armies faced a rigorous filtration process that screened them for loyalty, stressing their commitment to ‘Polishness’. This article argues that despite what has been characterised as a nationalising state, the early years of the Polish Second Republic witnessed a negotiated filtration process, in which functionaries demonstrated their commitment to Poland by appealing to a combination of non-national characteristics, including ties to locale, to professional acumen, and to the civil service in general. Officials who were not ethnically Polish thus succeeded in retaining their positions in the government hierarchy. This surprising outcome of post-imperial vetting suggests that lingering elements of respect for national difference continued to resonate in postwar Poland and that pressure for an ethnically pure nation-state was far from universal.