ALMOST 200,000 undocumented Cambodian migrant workers in Thailand had registered for a one-year amnesty, according to the most recent figures, before a deadline to avoid immediate deportation or arrest that expired yesterday. Andy Hall, a foreign expert at the Institute of Population and Social Research at Thailand’s Mahidol University, said yesterday that the one-month registration process for undocumented migrant workers from Cambodia, Myanmar and Laos had been a huge success. A total of 191,041 migrant workers from Cambodia had registered as of Tuesday, he said, despite excessively high registration fees and cases of extortion by brokers.