There are three different roles in the domain name registration process: The registry, registrar, and registrant.
Registry: A domain name registry is an organization that manages top-level domain names. As registry for .MU, MU-NIC creates domain name extensions, set the policies for that domain name, and work with registrars to sell domain names to the public.
Registrar: The registrar is an accredited organisation that sells domain names to the public.
Registrant: A registrant is the person or company who registers a domain name. Registrants can manage their domain name’s settings through their registrar. When changes are made to the domain, their registrar will send the information to the registry to be updated and saved in the registry’s database.
Registrars who are authorised to register .MU domain names on behalf of their registrants are:
IP Mirror (Speednames)
United Domains AG