Citizen Service
There are different rules and regulations depending on whether you want to move to Denmark for a longer period or only stay for a short time.
It also depends on your nationality (Nordic Citizen, EU/EEA Citizen or Non-EU/EEA Citizen as well as commuter/cross-boarder-worker) and the reason for your stay; for example, if you want to work or study, or have other reasons to stay in Denmark.
Digital solutions
Please note that Denmark is a very modern country, where IT and digital solutions are used to a very comprehensive extent. Therefore, you should expect that much of the information and documents you need will be downloaded online, and a large part of your contact with the official authorities will take place digitally, often via online self-service solutions.