Voter registration is often the most controversial and expensive component of an electoral process. No voter register is completely current and accurate, thus all voter lists remain exposed to complaints and objections, both of technical and political nature. Despite the central role played by voter registration activities in the electoral cycle and its significant costs, its relevance for EMB strategic planning and democracy support capacity-building programming has only fully emerged in recent years. Voter registration processes, regardless of the registration model or technology applications chosen to support them, touch upon broader issues related to the state’s administrative structure and social contracts. Voter eligibility rules are examined in Chapter 12.