The certifications and standards widely used to lend credibility to big brands’ sustainability claims are coming under fire, as environmental campaigners seek to air concerns ahead of a suite of new policy proposals.

A report from environmental campaigning organisation Changing Markets Foundation published Thursday dubbed the largely voluntary and self-reported initiatives brands commonly use to back up their sustainability efforts as a “licence to greenwash,” pointing to a lack of independence, transparency, ambition and accountability at high-profile schemes including the Higg Index, Cradle to Cradle and The Microfibre Consortium.

“At worst, these schemes are operating as a black box, with no external scrutiny, yet are informing major decisions about fibre and material use,” the report said.

The Sustainable Apparel Coalition, which develops the Higg Index, and Cradle to Cradle said they offer rigorous and scientifically robust tools and certifications designed to drive improvement. The SAC added that the report only looks at one of five tools and understates the scope of its product module. All Cradle to Cradle’s standard and methodology documents are available and open access on its website, CEO Christina Raab said in an email. The Microfibre Consortium did not immediately respond to request for comment.

The Changing Market Foundation’s report is the second in as many weeks to poke holes in fashion’s efforts to substantiate sustainability claims. A white paper published last Tuesday with the support of sustainability consultancy Eco-Age and the Geneva Center for Business and Human Rights cast a highly critical lens on the tools used to asses fashion’s impact, concluding that the data currently available is deeply flawed.

The two reports come as the European Union is prepares to lay out a series of regulatory proposals intended to drive greater sustainability in the textile and fashion industries over the coming months.

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