The access of the professional association to the information of the official Register of Sports Professionals of Catalonia on whether a certain sports professional is registered in it can be based on the legal basis of article 6.1.c) of the RGPD, in connection with the provisions of the transparency legislation. However, access to the professional association for the control of the professional intrusion of a person who is not a member of that association would not be justified by this legal basis.