A company using the services of a registrar accredited by a qualified accrediting body can be assured of the registrar's credibility, since the accreditation represents an independent assessment of the registrars ability to perform management system registration. Even further, customers of a company registered by an accredited registrar gain assurance that the company's registration is based on conformance with internationally accepted practices and procedures. It's for this reason that many registered firms display not only the registrar's certification mark, but also the accrediting body's mark on certificates and communications to their customers.

Many companies choose an IAAR member for their management system registration with the knowledge that all IAAR members are properly accredited and that the association promotes the integrity and consistency of the registration process among its members.