Thai Union Manufacturing TUM is a subsidiary of Thailand’s largest company processing and manufacturing fish products, Thai Union Frozen Products PCL. In the factories of TUM, 400 tons of tuna is processed every day. According to TUM, its factory complex is the biggest tuna fi sh processing plant in Asia, and it employs around 8,500 people. The factories are situated in Samut Sakhon province in Central Thailand. Half the factory workers are citizens of Thailand, and the rest are migrant workers from Myanmar and Cambodia. During the research, a Finnwatch researcher interviewed eight employees of TUM and seven employees of Unicord. Also a group of five newly arrived MoU-workers from Unicord were interviewed in cooperation with Unicord. All the interviewees were migrant workers from Myanmar. In addition, documents were examined, such as salary receipts, work permits, social security cards and receipts for work permit fees in possession of the workers. Unicord and TUM were given a possibility to provide their comments to the research findings. In addition Unicord’s human resources manager was interviewed for this report.