There are some additional options that can be enabled on the Default form.
Enable Google reCAPTCHA V2 service to make sure your quote requests are only generated by real users and bot requests cannot be placed.
Please, NOTE: only Google reCAPTCHA V2 is supported.
To enable this, please, go to Form settings, and make sure the Default form has been selected. Then, enable the option called Add a reCAPTCHA to the default form and add the secret keys that you have previously generated on Google. Please, refer to Google reCAPTCHA documentation for technical details about how to get this service enabled.
In addition to this, you can also help your users to place a request without having to fill all of their information every time. This way, logged-in users will automatically see their own information in the form fields and will save a lot of time if they want to send more than one quote request.