Electricity consumers should be able to change their electricity supplier quickly and smoothly in future. TenneT TSO GmbH has collaborated with both the Fraunhofer Institute for Energy Economics and Energy System Technology IEE and the Institute for Applied Systems Technology (AST) of Fraunhofer IOSB in the "MakoMaker Space" project demonstrating how the process could be completely digitalized and based on data room technologies in the future. The new process avoids inconsistencies in data, thus enabling rapid automated processing and should meet the requirements of the Federal Network Agency for 24-hour supplier changes.