The Contestation Café is one of a series of critical, yet practical, design interventions exploring users’ contestation of algorithmic decision systems. It is rooted in how the act of repair needs to move beyond the physical and into the digital domain of algorithmic systems.

The authors, Robert Patrick Collins and Johan Redström, would like to acknowledge the support of DCODE, Marie Skłodowska-Curie Actions and HORIZON 2020 in supporting this research.

Robert would also like to thank their co-supervisors Marco Rozendaal and Elisa Giaccardi for their direction, discussions and feedback, and also the faculty at Umeå Institute of Design, TU Delft and the University of Edinburgh for their inspirational conversations.