The information stored in key registers has to be up-to-date and reliable. One of the tools used to guarantee the quality of the key registers is Digimelding (‘Diginotification’), which enables users to ‘report back’. All users of the key registers have a legal duty to report any data that they know could be wrong. Reporting back contributes to efficient operations management within the government, improves the level of service, and increases the opportunities to fight fraud.