A report by Human Rights Watch has suggested that Cambodian-based suppliers of clothing brands such as H&M, Gap, Armani, Adidas and Marks & Spencer are carrying out unfair and discriminatory practices.
The report showed that workers are required to work overtime and there is discrimination against pregnant women.
In a statement by Aruna Kashyap, researcher at HRW said "These international apparel brands need to help labour law compliance by publicly disclosing and regularly updating the names and addresses of their factories."
A spokesman for Marks and Spencer commented: "We have not been presented with any evidence to support these claims," but added "If HRW comes to us with any evidence we will, of course, investigate."
The other fashion retailers involved say they have addressed the issues from the study.
H&M told the BBC: "H&M has distributed a translated copy of its suppliers' list to local unions and labour rights groups to encourage whistle-blowing on undeclared units."
Gap commented that it was “investigating the alleged labour practices highlighted in this report” and added that, if true, they are “unacceptable and violate our code of vendor conduct."
Adidas said that it has created a process for workers to seek whistleblower protection.
