Depending on which country your educational background comes from, the number of documents you must add, varies.
Most secondary degree Diplomas are assessed as being on the same level as the Danish High School Diploma. Though, there are some foreign degrees which require further academic education to be counted as a qualifying examination. Check our list of International School leaving examinations, to see which documents you need.
Is the country you are looking for missing on the list, you are welcome to contact firstname.lastname@example.org for more information.