The outgoing head of NI's exams board has claimed she was "treated less favourably and faced ongoing harassment and bullying" at the organisation.
Margaret Farragher resigned as interim chief executive of the Council for the Curriculum, Examinations and Assessment (CCEA) in June.
In her resignation letter, seen by the BBC, she claimed her position had become "untenable".
In response, CCEA said it took "any allegations very seriously".
Ms Farragher had been interim chief executive since Justin Edwards left in April 2021.
