The General Education Union (Algemene Onderwijsbond, AOb) is one of the partners of PNN. The AOb can support PhD Candidates in case of specific legal disputes. Because of this, we recommend PhD candidates to become of member of AOb (or another labour union). The membership contribution for in 2020 is 17,85 euro per month. By means of the Keuzemodel the costs for the membership of a union can be retrieved (partly) from the employer.