I have tried to claim cash back  but but the sony site is not secure as I get gray padlock with a yellow warning triangle displayed in the address bar.

 An internet search says "A gray padlock with a yellow warning triangle indicates that the connection between Firefox and the website is only partially encrypted and doesn't prevent eavesdropping. This also appears on websites with self-signed certificates or certificates that are not issued by a trusted authority"

As I have to enter my bank details how do I claim cashback using an unsafe web page. Is there anyway of notifying Sony. I want my cashback but at the expense of my bank details being available to all. Is this a way of Sony reducing the number of claims