The Department of Internal Affairs says it has auditing systems in place to catch any employee caught accessing information they are not entitled to see.
Toni Lorraine Bates, 40, of Porirua, appeared at Wellington District Court today charged with 11 counts of using computer log-ins and passwords to access the system.
Bates' alleged offending took place between August 20, 2008 and December 16, 2010 while she was working in Births, Deaths and Marriages.
Police said the information she allegedly accessed was not used for any criminal purpose.
Department spokesman Tony Wallace said staff were subject to an information code of conduct.