Despite increased interest in the effectiveness of anti-corruption interventions, relatively little is known about the issue. This is largely due to a lack of existing data and impact evaluations. The literature on successful anti-corruption programmes in MENA is particularly sparse. The general lack of research on this topic is compounded by political instability in the region. Institutional weaknesses, limited spaces for civil society participation and corruption in public service delivery are some of the pressing governance challenges affecting the region. This Helpdesk Answer considers the cases of Morocco, Jordan, Tunisia and Palestine to derive lessons learned from anti-corruption interventions.