def _set_session_is_verified(self):
        if not valid_referer(self.request.META):
            return
        try:
            url = self.request.META.get('HTTP_REFERER', '')
            url_name = resolve(parse.urlparse(url).path).url_name
        except Resolver404:
            return
        if url_name not in self.check_requests_from:
            return
        device_key = self.request.COOKIES.get(COOKIES_USER_DEVICE_KEY, None)
        user_device = self.request.user.devices.filter(device_key=device_key).first()
        self.request.session[SESSION_IS_VERIFIED_KEY] = getattr(user_device, 'is_verified', False)