This article explores the social relationships created in the delivery of conditional cash transfer (CCT) programmes using a wellbeing lens. Most CCTs influence people's lives in overarching terms, including income, health and education. Their implementation process, however, also places policy participants in new and constant interactions with the front-line officers that implement the programmes. Wellbeing scholarship brings to our attention the centrality of social relationships in people's lives. This literature widely agrees that the quality of our relationships with others is possibly the most essential element of a good life. Therefore, given the recent entrance of wellbeing to the realm of policy, an exploration of the relationships created in policy contexts using a wellbeing lens is a necessary next step. This article examines this in the context of the Oportunidades/Prospera programme in Mexico, one of the most successfully regarded CCTs in Latin America. It presents primary qualitative data about the officer–recipient relationship during the delivery of the health conditionalities and explores its implications on the wellbeing of recipients. The article concludes that the relationships created during policy implementation have far-reaching effects on wellbeing and need to be better acknowledged in policy design and evaluation.