Whereas computer-supported sharing of information is a core issue of e-Government integration and interoperation, the key players involved hardly find any guidance how to settle for an agreement covering the various aspects related to information exchange. Hence, we argue that e-Government research needs an explicit dedication to the phenomenon of information quality (IQ). We base our analysis on key players and constituents in e-Government, and on how those key players? and constituents? needs and wants, roles and agendas shape the view on and the understanding of IQ. We propose detailed and practical steps for information sharing in e-Government interoperation projects and demonstrate how those steps are related to information quality.