Well there are standards that can be checked against, and they go to the companies and talk to them. The good ones often already have CSR departments. If there

Well there are standards that can be checked against, and they go to the companies and talk to them. The good ones often already have CSR departments. If theres something shady happening, it is often not hard to find - there are lots of environmentalists and NGOs that regularly dig up dirt. Also, a company can't just fake a reputation. Not saying that nothing can be hidden, but its not just bits and bytes and paperwork that can be faked, its the real world.