After 1945, on the so called 'Regained Territories' in Western Poland a considerable number of ethnic Germans and Silesians have remained. Despite their declared intentions, many have not received permissions to leave their new 'fatherland'. It was not until 1956 that travel to German Federal Republic have been made possible. However, Polish authorities tried to impede the outflow of people from the area. One of the methods was to control personal correspondence between German population living in Poland and Germany. Today, the reports of the W Bureau - an institution in charge of controlling the private mail - are a rich source of data about the mood among the pre-war population of Western Poland. By presenting unknown historical sources, the author of the article aims to describe the attitudes of people assessing the decision to leave or remain in Poland.