They are also suggested to calmly submit the documents if asked by police,  the online reported.

The notice also provided contact numbers for the embassy, and invited calls from any Burmese national in Thailand requiring assistance.

According to Burmese migrant sources, Thai police have been conducting surprise inspections in the markets of the northern city of Chiang Mai, where many Burmese migrants make their livelihood.

Ko Oo, a Burmese migrant worker living in Chiang Mai, said it had been worse than previous crackdowns, with Thai police intervening not only in migrants’ workplaces but also in the houses and makeshift structures where migrants live. He said small shops run by Burmese migrants in the city had been kept shut as a precaution.

During workplace raids, Ko Oo was quoted as saying the police arrest all migrants whose papers state different employers and workplace addresses.

In recent days, a crackdown by Thai police and soldiers has been taking place in Mae Sot, a town near the Burmese border with a large transient Burmese population. Reportedly many Burmese migrant workers in the town have been arrested and deported to Myawaddy, the Burmese town on the other side of the border.

It is estimated that there are about three to four million Myanmar migrants in Thailand, only 1.7 million of whom are registered, the online said.

On a trip to Thailand in June, Burma’s State Counselor Aung San Suu Kyi made a series of public addresses, including to Burmese migrant workers at the Talay Thai Seafood Market in the port town of Mahachai in Samut Sakhon Province. She cited agreements for increased cooperation with the Thai government on ensuring migrants’ labor rights, as well as plans to improve job opportunities in Burma in order to tempt migrants back.