British employment service delivery has shifted towards a model primed on core ‘workfare’ objectives – that is, enforcing behavioural compliance to work-related duties and expanding participation in work. Nevertheless, significant gaps remain in current knowledge about how workfare is implemented daily by frontline staff. The existing international street-level research on employment service delivery reveals how workers use a range of discretionary practices to achieve workfare objectives. Yet this research largely ignores how, in practice, a key aspect of enforcing behavioural compliance and encouraging work participation is through contending with its opposite – behavioural non-compliance. Analysing 13 interviews with frontline staff, this article contributes to street-level knowledge by revealing the ways managers and workers in British employment services are encouraged to detect and correct variations of claimant non-compliance.