This paper discusses under what circumstances residence and citizenship by investment (RBI or CBI) schemes could be used by individuals engaging in tax avoidance or evasion. It describes the market for CBI and RBI and how features of the offered programs might reveal the underlying motivations of governments offering them. The paper then presents empirical evidence on the conditions under which such schemes are offered. Finally, the paper estimates the impact of such schemes on investment, house prices, and public revenues.