monetary loans and grain advances called in, stores closed, grain supplies, livestock, and food confiscated as a penalty, and was cut off from trade. Its Communist Party and collective farm committees were purged and subject to arrest, and their territory was forcibly cordoned off by the OGPU secret police. Although nominally targeting collective farms failing to meet grain quotas and independent farmers with outstanding tax-in-kind, in practice the punishment was applied to all residents of affected villages and raions, including teachers, tradespeople, and children. In the end 37 out of 392 districts along with at least 400 collective farms where put on the "black board" in Ukraine, more than half of the blacklisted farms being in Dnipropetrovsk Oblast alone. Every single raion in Dnipropetrovsk had at least one blacklisted village, and in Vinnytsia oblast five entire raions were blacklisted. This oblast is situated right in the middle of traditional lands of the Zaporizhian Cossacks. Cossack villages were also blacklisted in the Volga and Kuban regions of Russia. In 1932, 32 (out of less than 200) districts in Kazakhstan that did not meet grain production quotas were blacklisted. Some blacklisted areas in Kharkiv could have death rates exceeding 40% while in other areas such as Vinnytsia blacklisting had no particular effect on mortality. The passport system in the Soviet Union (identity cards) was introduced on 27 December 1932 to deal with the exodus of peasants from the countryside. Individuals not having such a document could not leave their homes on pain of administrative penalties, such as internment in labour camps (Gulag). Joseph Stalin signed the January 1933 secret decree named "Preventing the Mass Exodus of Peasants who are Starving", restricting travel by peasants after requests for bread began in the Kuban and Ukraine; Soviet authorities blamed the exodus of peasants during the famine on anti-Soviet elements, saying that "like the outflow from Ukraine last year, was organized by the enemies of Soviet power." There was a wave of migration due to starvation and authorities responded by introducing a requirement that passports be used to go between republics and banning travel by rail. During March 1933 GPU reported that 219,460 people were either intercepted and escorted back or arrested at its checkpoints meant to prevent movement of peasants between districts. It has been estimated that there were some 150,000 excess deaths as a result of this policy, and one historian asserts that