This article critically examines the governance of identity in the context of children's social care. There is a widespread assumption in government policy and technical practice that information can be integrated across organisations and sectors. This article questions these assertions using a case study (‘Mary's story’). It draws on a range of insights from the philosophy of Charles Pierce, information systems practice and social theory. This provides a platform to explore the governance of identity information for VCS organisations, service providers, and user(s). The logics of the governance of identity information in current and future service co-ordination and delivery are examined.