The research objective is to determine the impact of certification on teacher performance in the learning process in an effort to improve the quality of learning and the quality of education in the school environment. To find out the impacts of the implementation of the government policy on teacher performance, a special test was conducted, comparing certified and uncertified teachers. Their performance would be observed based on four competencies namely pedagogic, personality, social, and professional. The results showed, overall there was no difference in performance between certified teachers and uncertified teachers. This condition is seen in the component of the teacher's pedagogical and professional abilities. Teachers who have been certified have not had an impact on improving their performance. The certified teachers should have a much better performance than non-certified teachers, however apparently not show the difference. In order that professional improvement training for certified teachers is needed.