Filing an appeal
You can file an appeal with the Board of Appeal for Examinations (CBE) if you disagree with a written decision by the Board of Examiners or an examiner from your faculty. You can only appeal if you yourself were directly impacted by a decision. You can also file an appeal if the relevant administrative body refuses to take a decision.
Grounds for appeal
Your appeal must be based on legal grounds, i.e. you must be able to demonstrate that the decision violates Article 7.61 paragraph 2 of the Higher Education and Research Act (WHW). This could take the form of:
a decision that violates generally binding rules, such as the Education and Examination Regulations (EER) or the Rules and Regulations (RR);
an abuse of power when the decision was taken;
an unreasonable decision-making process;
a decision that contravenes some other principle of good governance, such as the principle of legitimate expectation (e.g. the Board of Examiners has failed to honour a promise) or the duty to give reasons (e.g. the decision is based on incorrect facts or not properly substantiated).
Naturally, in your notice of appeal you must properly substantiate your grounds for appeal.