System used to monitor migrant laborers in Arab countries
The kafala system (also spelled "kefala system"; Arabic: نظام الكفالة, romanized: niẓām al-kafāla; meaning "sponsorship system") is a system that exists in many Arab countries in the Middle East, including most of the nations on the Arabian Peninsula, which involves binding migrant workers to a specific employer throughout the period of their residence in a country. The same system existed in Israel under the label "binding labour", until that country's supreme court eliminated it in 2006.
https://en.wikipedia.org/wiki/Kafala_system