Basic requirements for a visa application to Denmark must be met

The basic requirements you will need to abide by to obtain a visa to Denmark include:

A valid national passport or other valid travel identification.

    – Two passport photos. The photo must be 35 mm x 45 mm (size of head 30-36 mm from the bottom of the chin to the top of the head).  
    – An invitation, if possible, from a reference in Denmark, with information about the persons you will visit, as well as their name and address, purpose of your visit, and a description of the relationship between you and your reference in Denmark.
    – Information about their CPR number (Danish Personal Identification)

 and Alien Identification number (if applicable) of your reference in Denmark.