Hundreds of thousands of migrant workers in Thailand face arrest and deportation unless they meet the 2 March deadline to register with authorities.
The registration is compulsory for all workers who have work permits. They will have to verify their nationality with local employment offices.
Critics say the registration system is difficult to understand and instructions are not translated into ethnic migrant workers' language.
The Thai authorities say the program is a path to legal work under the protection of national labour laws that were previously denied to undocumented workers.
The majority of migrant workers in Thailand are Burmese and it is reported that only 1.3 million out of more than 2 milion of them are registered.
Human rights activists say many Burmese avoid registering because of the lack of awareness and fears of possible repercussions by the military government.
Andy Hall is the director of the Migrants Justice Programme for the Human Rights and Development Foundation.
First broadcast 1 March 2010