Duo headquarters in Yeoksam-dong, Gangnam-gu, Seoul. Yonhap News Korea's largest marriage information company, 'Duo', is being investigated for allegations of workplace harassment and unfair dismissal of counseling managers who are dispatched workers. There were also claims that the duo violated the dispatch law by exercising personnel rights over managers. According to the Kyunghyang Shinmun coverage on the 1st, the Seoul Regional Employment and Labor Office is conducting an investigation into the duo's alleged violations of the Labor Standards Act.