Online voting is used by many organisations in New Zealand, including by some iwi for rūnanga elections, unions, and clubs. While online voting has not yet been used in local or general elections, steps have been taken to trial it for local government elections. This paper was written to provide background material and references on some of the issues raised in discussions around online voting for government elections; it is not an analysis of any specific policy, document or model of online voting. The paper is structured around problems and solutions: what problems do proponents hope online voting will solve? What do we know about whether it would actually solve these problems? And what new problems might online voting create?