Unauthenticated users are those who have not been authenticated using Fernand's secret hash and just provided their Name and Email address as contact data. This data is not verified, which is why we advise our users to treat incoming requests from unauthenticated users with caution.
Once a user replies to a thread from their email address, the conversation will change status and become verified. Additionally, you are also able to authenticate the user by passing extra information on the widget.