Are you starting your studies for the first time in the Netherlands? After the Erasmus University has arranged your residence permit, it will be automatically uploaded into Osiris. You do not need to take any action.
Do you already have a residence permit from your previous study?
You are not required to upload any documents to Osiris, but keep in mind that you need to extend your permit three months before your current permit expires.
If the status of your enrolment is pending due to missing residence permit, please contact the EUR immigration desk.