Checking this https://racq.travelinsurancepartners.com.au/, you will find the browser is displaying things OK.
However, browsing https://www.travelinsurancepartners.com.au/, you will see the browser reports the SSL certificate is for covermore.com, and warn about security problem.
Yes, the certificate is for covermore.com, however, how come IE, Firefox and Chrome all do not report problem when accessing https://racq.travelinsurancepartners.com.au ???