Collecting evidence of crime
Members of the underground played a special role in revealing the Nazi atrocities at Auschwitz to the world. Polish prisoners, and especially members of the camp resistance movement affiliated with the AK and the international Kampfgruppe Auschwitz (Auschwitz Combat Group) prepared reports and lists on SS crimes that were smuggled to the outside world through covert channels. They also sent copies and extracts from the camp records, and even stolen documents. Couriers then transferred this material from the camp vicinity to ZWZ-AK headquarters or the Domestic Government Delegation, from where it was sentby radio or courier to the Polish government-in-exile in London.