"Before reaching a conclusive answer on the potential of blockchain for development purposes, we believe it is worthwhile to implement a number of proofs-of-concept and pilot projects for the most promising use cases. These will not only help us determine the practical benefits of distributed ledger technologies (DLT) and acquire much-needed implementation know-how, but also pave the way for successful scaling efforts. With this in mind, we developed this publication as guidance for practitioners from government, the private sector and actors from international cooperation and development. We are aware that no onesize-fits-all approach exists, and in many cases individual evaluations will be needed, taking into account both the specific context of application and the increasing convergence of blockchain with other technologies such as sensor networks, Artificial Intelligence, fintech applications and cloud computing.