The latest update to Member Splash adds the ability to use Geofences in forms. A geofence is simply a boundary defined on a map that can be used to automatically verify if an address falls within that boundary. Based on that you can use conditional logic to do things like hide or show products; charge different prices; or disable form submission entirely.
It works with standard address fields as well as ones using the Address Autocomplete setting. You can find full documentation here.
