NO-IP chiede la conferma solamente se l'host non viene aggiornato da 30 giorni

Free hostnames must be updated every 30 days in order to keep them active. We do this to keep our network clear of unused hostnames. We send frequent notifications via email to remind you to update your hostname, or you can manually update your hostname by logging in to your No-IP account and clicking the “Hosts/Redirects” tab, click “Modify” next to the hostname you would like to update and click “Update” at the bottom right.
If you do not wish to do this every 30 days, you can upgrade to Enhanced Dynamic DNS. Enhanced Dynamic DNS removes the 30 day host activation requirement.