This report is based on a desk-based review of secondary data, comprising published material as well as grey literature, supplemented with key informant interviews for programmes that lacked documentation. Section One summarises the current use of CBI in WASH programming in refugee contexts. Section Two summarises the best practices and lessons learned including challenges faced, drawing on evidence from the project examples found. Section Three provides recommendations and best practice guidance for use of CBI in refugee settings. Section Four details existing tools and guidance.