The Zaragoza Citizen Card is about the active involvement of citizens in Zaragoza in addressing societal challenges in the city. The Zaragoza Citizen Card is a smart card offering citizens the opportunity to access and pay for 20 local public services (transport, parking, public libraries, swimming pools, etc.) To date, over 230,000 citizens (more than half of the city’s adult population) have applied for the card, which is helping to reinforce the sense of community. With payment processing services included, holders of the Citizen Card can even choose between prepaid and post-paid plans. The system generates ‘big data’ that can be fed into the city’s innovation ecosystem.