As a rule all types of work requires a work permit.

Whether or not something can be considered as work, is defined by the nature of the task and not whether or not you receive a salary or fee.

If you are only going to work in Denmark for a very short period of time, there are specific rules of exemption for researchers.

You can read more about the rules of exemption here

Being an examiner or doing other examination tasks can be so closely linked to your position as a researcher at a Danish University that it may come naturally to seek appointment as an examiner.

As a researcher you may therefore be allocated as an examiner or do examination tasks at another university than the one employing you, without needing to apply for a work permit for sideline employment.

This applies to both written and oral examinations.

SIRI suggests that you send a copy of your appointment from the corps of censors so there is no doubt that you have been appointed examiner or other examination tasks.

Are you not a researcher, but have a work permit valid with a specific employer, you must apply for a separate work permit for sideline employment if you are going to be an examiner at another institution or company.

You can read more about and apply for a work permit for sideline employment here

A woman from India is allocated as an examiner at a Danish University.

Ordinarily, she works as a researcher, and has a residence and work permit under the Pay Limit scheme at another Danish University.

She has sent documentation for her appointment to SIRI (e.g. a mail from the corps of censors)

A work permit for sideline employment is not required.

An Egyptian woman is employed as a chemical engineer by a Danish company and has a residence and work permit under the Pay Limit Scheme.

She has been allocated as an examiner at a Danish University and has sent in documentation for the appointment (e.g. a mail from the corps of censors)

A work permit for a side-line occupation is required.

Since the woman has a residence and work permit on a different basis from a researcher she cannot be allocated as an examiner to another employer without a separate work permit for sideline employment.