Electoral registration officer

In the United Kingdom, an electoral registration officer (ERO) is a person who has the statutory duty to compile and maintain the electoral roll^[1] (which includes conducting the annual canvass^[2]). Any expenses incurred by an electoral registration officer in the performance of his/her functions are paid by the local authority which made the appointment,^[3] except in Northern Ireland, where the Chief Electoral Officer's expenses are covered by the Northern Ireland Office.^[4]