In late 1941, people who were under threat went into hiding. That is when people also started forging personal identification cards. Jews, resistance fighter, people who refused to report for forced labour were at great risk if they carried their own personal identification cards. Dozens of groups forged documents. The largest organisation was the Personal Identification Card Centre, which was established in 1942. Members of the group were involved in the attack on the Amsterdam Register of Births, Deaths, and Marriages. This attack was an attempt to destroy the personal details index of the Jews in Amsterdam.
