Laboratories that provide metrological services must approve their competence in order to be recognized on the service market. In addition to the implementation of relevant standards, it is necessary to pay special attention to the relevant bodies through which metrology laboratories confirm their competences, i.e. to the international status of these bodies in the recognition and confirmation of measurement results and issued certificates. Regardless of whether they are metrology organizations, international or regional or on accreditation bodies, their members sign certain agreements through which their users can use measured results and certificates issued by these laboratories without barriers. On the basis of international agreements and declarations between international organizations, mutual recognition of measurement results and issued certificates is possible. The paper was prepared based on the experiences of the Institute of Metrology of Bosnia and Herzegovina, as a national metrology institute on its way to proving and confirming its competence and recognition at the international level and has the aim of giving an overview of international quality infrastructure organizations and their role in this process.