The debate over home state responsibility for human rights has focused on how home states might use accountability mechanisms to promote respect for human rights among their businesses abroad. However, a set of activists and researchers have opened a new front on the question of home state responsibility by focusing on the activities of Canadian diplomats providing advice and consular services to extractive firms abroad. This work documents how home states can be directly implicated in business and human rights controversies and how home state diplomats can put human rights defenders at increased risk. This paper outlines the growing body of research on the hidden influence of Canadian economic diplomacy in human rights controversies, suggesting a troubling disregard for corporate social responsibility and human rights concerns in these contexts, and making the case for robust accountability mechanisms to influence the conduct of both corporate actors and diplomatic officials.