Go to the .my Domain Registry Domain modification page:
http://web.domainregistry.my:7002/Mynic-ViewController-context-root/faces/PB/UserLogin.jsp
Enter Domain name, select Domain extention and click modify
Select login as "Administrative Contact", enter administrative user ID, password and click "Login"
After login, click "Option 4" (Modify Registrant Name)
Change Registrant name accordingly, select reason to change and click modify.
.my Domain Registrywill verify the changes before approve.
Reconfirm your change by whois your domain at:
http://whois.domainregistry.my