A mass emigration was politically undesirable for the Soviet regime. The only acceptable ground was family reunification, and a formal petition ("вызов", "vyzov") from a relative from abroad was required for the processing to begin. Often, the result was a formal refusal. The risks to apply for an exit visa compounded because the entire family had to quit their jobs, which in turn would make them vulnerable to charges of social parasitism, a criminal offense. Because of these hardships, Israel set up the group Lishkat Hakesher in the early 1950s to maintain contact and promote aliyah with Jews behind the Iron Curtain.