Yes, it is possible to challenge a refusal of Danish citizenship, but there is no formal appeals board equivalent to other areas of immigration law, such as the Immigration Appeals Board (Udlændingenævnet). In other words, there is no dedicated appeals body for decisions on Danish citizenship.
If you receive a refusal regarding your application for Danish citizenship, you can initially request a reopening or reconsideration of your case through the Danish Nationality Office (Indfødsretskontoret).
If you believe there has been an error in the handling of your case—for example, insufficient reasoning or procedural mistakes—you may also file a complaint regarding the administrative process. In addition, you may contact a Member of Parliament sitting on the Parliamentary Citizenship Committee (Indfødsretsudvalget) if you believe your case has been assessed or handled unfairly.
If you remain dissatisfied after exhausting the ordinary complaint options, you may bring your case before the Danish Parliamentary Ombudsman (Folketingets Ombudsmand). However, the Ombudsman cannot grant citizenship; they can only assess whether the authorities have handled your case correctly and may recommend that the case be reconsidered.
In exceptional situations, legal matters may be reviewed by the courts if there are issues of legal error.
In short: you can challenge a refusal, but Danish citizenship is ultimately granted by law through Parliament, which means that formal appeal options are limited. Therefore, it may be beneficial to consult a Danish citizenship lawyer, an immigration lawyer in Denmark, or an immigration lawyer in Copenhagen to ensure that your interests are properly represented.
