The password recovery link is valid for 24 hours, be sure to use the link within this time limit. If the link is "expired" try the procedure again respecting this limit.

It is possible that your mail client "breaks" the address in this way:

https://nomeente.acquistitelematici.it/guard/forgot_password/cbfa44296ae34f256978cd2648

In this case, we recommend that you copy the text of the link and paste it into the address bar of your browser..