Władysław Raczyński, serving as the Polish ambassador to the United Kingdom, presented a pivotal note to the allied governments during World War II. This note provided the first detailed account of the Holocaust's impact on the Jewish population of Poland, highlighting the systematic extermination carried out by the Nazis. The document was part of the Polish government's efforts to inform the international community of the atrocities occurring in their homeland while they remained in exile following Poland’s occupation by Nazi Germany and the Soviet Union.

Raczyński's Note meticulously outlined the grim reality faced by the Jewish communities in occupied Poland, detailing mass executions, deportations, and the establishment of concentration camps. The urgency of the report conveyed a sense of despair, urging the 26 allied nations to recognize the dire circumstances and act in response to the escalating crisis. The Polish government intended for this report to catalyze a unified effort among the Allies to intervene and stop the genocide.

The dissemination of Raczyński's Note marked a significant moment in the wartime documentation of atrocities, as it represented one of the earliest official acknowledgments of the Holocaust in global discourse. While the note did not directly result in immediate action, it served as an essential historical document and laid the groundwork for further communications regarding Nazi crimes against humanity as the war progressed.