There are over 50,000 unauthorized migrants estimated to be living in the United Kingdom, according to a report by the United Nations Office on Drugs and Crime. An additional 100,000 migrants are estimated to live in other cities across Europe, primary in the Czech Republic, Germany and Poland.
In South Korea, there are over 10,000 Vietnamese migrants working in the country unlawfully.
In total, around 850,000 Vietnamese migrants are working around the world without proper documentation.
Source: “Migrant Smuggling in Asia: A Thematic Review of Literature,” United Nations Office on Drugs and Crime, August 2012.