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

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

Natural Spanish citizens
Spanish passport
EEA and Swiss passports
National ID card
Certificate of Citizenship

Foreign citizens 
EEA and Swiss citizens: Identity card

Non EEA + Swiss:
Stay card
Family of Spanish, EU, EEA or Swiss citizen
Family reunification in the general regime
Residence and gainful employment
Residence and self-employment
Residence and work for research
Temporary residence and work for highly qualified holders of EU blue card professionals
Long term residence
Residence for entrepreneurs and business
Residence for training or research
Residence for highly qualified professionals 

All of these documents can be uploaded securely through Zinc.