This paper contributes to the debates on policy mobilities by examining Business Improvement Districts (BIDs) in Germany as examples of contested, failed and unfinished travelling policies. Recent debates on policy mobilities opened a fruitful discussion on how policies are transferred from one place to another and the complex processes that rework places and policies in heterogeneous ways. While we are sympathetic to this literature, there are theoretical and empirical gaps to be addressed. It is frequently stated that processes around the transfer and grounding of policies are complex, and that outcomes are far from secure. However, the empirical focus in most cases is on transfers that are more or less "successful", or at least portrayed as being successful by their advocates. In contrast to this "success bias" in research and public discourse, we argue that it is helpful to focus more closely on failures, resistances and contradictions. Judging from work on the transfer of BIDs – an almost classical example of successfully mobilized urban policies – we argue that it is helpful to reflect on unfinished policy mobilities, that is, the failure of mobilized urban policies.