I am setting up a guest-only checkout system. I've got the default setting for the checkout to checkout as guest, and I've hidden the radio button options to create an account or checkout as guest. Trouble is, the email address verification puts up a notice "That email address doesn't belong to any previously saved accounts. Please select "create an account" below if you'd like to save your details for your next visit." But those aren't options for us. We simply don't want users to create accounts.
What's a good strategy to disable this verification and messaging?