This article takes stock of the many private and public instruments enacted transnationally to tackle the pressing problem of deforestation, ecosystem conversion, and associated human rights violations caused by international demand for and trade in agricultural commodities. The article argues that non-financial due diligence based on no-conversion criteria, and in line with the United Nations Guiding Principles on Business and Human Rights, holds considerable potential for ensuring deforestation-free value chains by enrolling and scaling up firm-level supply-chain management systems and private standards. The article introduces the main features of a possible European Union measure that disciplines via non-financial due diligence the placing on the market of commodities and products associated with deforestation, ecosystem conversion, degradation of forests and ecosystems, and associated human rights violations. Such a measure would also have the effect of streamlining initiatives enacted by private authority.