Alex - A2 Hosting
Active member
You should have a SSL certificate on your website / client area regardless of google's requirements.
Oh of course! Anyone without one isn't really serious about their business.
Just checked my account and the option to disable it is possible & from their support area:
Google will reject unsigned carts by default unless you edit your account security settings.
Really wish Google Checkout supported multiple currencies though I'm glad WHMCS has implemented a work around for this.