What documents can be accepted for right to work in Denmark?

To perform a right to work check in Denmark, the following documents can be accepted: 

Natural Danish citizens
Danish passport
EEA and Swiss passport
Proof of Nationality certificate
Birth certificate (showing parent's nationality as Danish)

Foreign citizens 
EEA and Swiss:
Registration certificate
EU permanent residence card
All non-EEA:
Green card
Work permit
Establishment card
Resident permit for accompanying family members
Resident permit for asylum seekers
Photograph of passport for foreign nationals

All of these documents can be uploaded securely through Zinc. 

Check out more detailed information on running employment background checks in Denmark.