Halal certification is an activity that encompasses many areas, including food. However, both globally and in our country, halal certification organizations have a dispersed structure and can adopt different standards. It is crucial to examine the role and effectiveness of accreditation bodies in the face of the differences in implementation caused by this situation. The fact that administrative law is relevant in terms of certification bodies and accreditation, and competition law is relevant in terms of competition infringements, necessitates a detailed examination of the issue with its administrative law and competition law dimensions. Organizations issuing halal certificates can be legal bodies under private law as well as public law. The authority for accreditation belongs to the Halal Accreditation Institution, a public legal entity. If the conditions of the organizations issuing certificates are formed within the framework of Law No. 4054 on the Protection of Competition, their impact on the market that restricts or inhibits competition can be subject to the acts prohibited by the Law. At the point where competition is violated, as a regulatory and supervisory superior board, the Competition Authority must ensure market order by ensuring a safe competition environment in the market.