This chapter is concerned with further advancing a process perspective on partial organization. More specifically, we address the question of how the different organizational elements of partial organization (i.e. membership, hierarchy, rules, monitoring, and sanctions) interrelate dynamically. Based on the emerging ‘communication as constitutive of organization’ (CCO) perspective in organization studies, we argue that social collectives can alternate between states of organizational ‘partialness’ and ‘completeness’ over time. The temporary and situational completion of partial organization can occur in and through communicative events that demonstrate and ‘celebrate’ a social collective’s ability to mobilize all five elements simultaneously. We illustrate our theoretical considerations by drawing on selected findings from an earlier empirical case study of the hacktivist collective Anonymous.