This paper considers issues relating to different "disclosure of origin" obligations, their compatibility with TRIPs and relationship to other regimes such as the FAO International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA) or UPOV. It covers developments in the Convention on Biological Diversity (CBD), Access and Benefit Sharing (ABS), as well as specific cases where disclosure might have made a difference, such as the Enola Bean, Hoodia and Rosy Periwinkle cases.