In 2007, the Dutch municipality of Landgraaf requested an investigation into whether a community currency could support its anti-poverty policies. The literature research assembled empirical data on scrip, LETS and Time Banks. Their effects were evaluated against a set of specific goals: poverty relief, provision of care, social integration and return of long-term unemployed to the labour market. Complementary currencies have still to prove themselves on all objectives, and the last one is particularly hard to achieve. However, for the most part, the systems being investigated have not been set up in a professional way or with longer-term finances available. With these prerequisites in place, and a formal, trustworthy organisation taking the initiative, a complementary currency could still be a useful policy instrument. A Time Bank-like construction would work best, with a professional broker and a limited working area.