A Schengen visa decision can be appealed by the applicant, or by another person if the applicant has authorized that person to speak on her behalf (this is done by a written power of attorney).
This is an example of a power of attorney.
An appeal shall arrive at the Embassy within 21 days after notification of the decision. Due to GDPR legislation we recommend sending it by mail. (However, appeals recieved by email will also be accepted.) Submission of appeals at the Embassy takes place on Tuesdays and Thursdays at 2pm-3pm only. Note that no original documents of value shall be submitted with the appeal and that all documents shall be in French, English or Swedish.
The appeal must mention the following points:
The Embassy will examine whether there is a need to modify the decision. If no change is made, the case will be sent to the Administrative Court in Sweden. The Administrative Court is responsible for notifying the applicant of their decision.