“…Studies of complaining, including of complaints in long sequences in single interactions, abound; the point of departure for this study is its focus on a series of third‐party complaints by the same complainant to the same recipient spread across four discrete encounters, the first and last of which are separated by 21 weeks. A methodological challenge in studying potentially ambiguous practices like complaining is that ‘the moral work’ achieved through detailing the circumstances of a possible complainable may be implicit, with none of the participants explicitly displaying their orientation to the matter as a complaint (Drew, 1998, p. 302; Pino, 2015). This paper aims to show how, by studying the possible complainant's detailing work longitudinally, that is, across successive encounters, and by paying careful attention to the minutiae of the design of this detailing work—features like use of reported speech, marked use of reference, category work—we can make a defeasible case (a) that complaining is indeed the interactional practice underway; and (b) that the underlying target of these pieces of detailing work—these signals of complainability—is the same person on each occasion.…”