Because of the Schaffhausen population's needs regarding more flexibility of authorities, an augmented importance of online services and increases in (cyber) security awareness, the e-government committee (eGov-Kernteam) of the Canton of Schaffhausen decided to pilot the electronic identity Schaffhauser eID+ to ultimately allow for efficient and effective Smart Government processes. * The aim of this practice article is to show how the Canton of Schaffhausen adopted a co-design approach to introduce its electronic identity and to set out key findings regarding the introduction of a technology-based public service innovation. Based on the strategic approach of a 'testing laboratory', co-design methodology was used through conducting usability tests and semi-structured interviews with selected individuals. The optimization suggestions collected were subsequently evaluated and reintegrated. Furthermore, the collected data were used to analyze the acceptance of the Schaffhauser eID+. This piloting procedure in cooperation with citizens unites several advantages: modest budgets, rapid and more targeted product changes and, in the sense of co-design, positive spillovers with regard to acceptance and legitimacy. In reference to Smart Government and to ensure ongoing civic participation, the co-design approach should also be considered in the further development of any E-ID or Smart Government project.