Public administration is undergoing a radical transformation. Citizens, rather than administrative documents, will be the primary and active subjects of the process of service supply. A new attitude toward administrative service is emerging. Citizens interact with public administration through new channels such as unified administrative counters, multifunction administrative counters, citizen liaisons offices, and Internet. Furthermore, having in mind the goals of shortening the distance between citizens to public administration and improving efficiency and efficacy of public bodies, the use of call and contact centres is quickly spreading out. It is worth to recall the recent case of Allô Service Public, the unified call centre of the French public administration, which on its first day of activation has been contacted by more than 100,000 people, more than any optimistic expectation. For a public administration, a call centre represents a simple way for interacting with citizens. Call centres provide many advantages such as improved efficiency, increased hours of operation, and reduced costs. The main advantage for citizens is that call centres can provide the information they need, as fast as possible and reducing waiting time. Call centres and contact centres are based on an innovative use of the phone channel, on one side, and on multi-channel strategies of access to service and information, on the other side. The combination of these two aspects allows public administration to develop and activate new modes of managing interaction with citizens. A phone-based information service is often the first channel chosen by citizens that want to get in touch with a public body. Call centres, on the other hands, have a relevant role for implementing the link between front-office and back-office services.