In the context of apparently ubiquitous relations of debt, it has been argued that the debtor possesses a unique, revolutionary potential. Why is this potential seemingly as yet unrealised? Where might nascent debtor publics be found? And what conditions, what infrastructures, might facilitate their emergence? In answering these questions, this paper argues that there are spaces where emergent "counteragencing" debtor publics can be detected -however, these are organising less around the issue of (consumer credit) borrowing than default. By analysing a prominent online debtor's forum in the UK -the Consumer Action Group debt collection industry sub-forum -the paper argues that such spaces contain important insights into the politics of credit markets and debt default, collective practices of calculation, and the formation of publics.