Changes in the Immigration Act that came into effect on 1 August 2010 make it possible for authorities to compare information contained in various electronic registers maintained by the Immigration Service and other public authorities. 

The new regulation means that in all applications submitted after 1 August 2010, the Immigration Service will be able to compare information contained in its registries with records held by the Central Office of Civil Registration (CPR Office), the Buildings and Housing Registry (BBR) or in the income registry in order to ensure that applicants meet the requirements for their residence permits.

Comparing information will serve as a supplement to the current control checks used to ensure that foreign nationals in Denmark continue to meet the requirements for their residence permits.

Comparing information with CPR Office and BBR records will begin in autumn 2010. Such comparisons will allow authorities to ensure that a person holding a residence permit on the grounds of family reunification with a spouse is in fact living together with his/her spouse.

Comparing information with income registry records will begin in 2011. Such comparisons will allow authorities to determine whether a residence permit holder meets income requirements. 

The information obtained using the comparisons will lay the groundwork for an improved picture of patterns and trends, and will create a better risk profile which the Immigration Service can use when carrying out control checks.

If residence permit holders are found to no longer meet the requirements for their residence permit, they risk having their residence permit revoked, and because they will be considered illegal residents or to be working illegally, they will also face legal action. They also risk being expelled and given an entry ban, i.e. they will be banned from entering Denmark for a certain period of time.