The PIN is an alphanumeric code that enables you to register as a certified user. It is issued by the registry office of the Municipality of Milan and it can be obtained in person at the Registry offices with a valid ID or by downloading, completing and sending the attached REQUEST PIN form by email to: PIN@comune.milano.it with a copy of a valid identity card or passport The Taxpayer Code is a numerical code associated with each taxpayer in the Municipality of Milan and is needed to register as a certified user as an alternative to the PIN. You can find it printed on the Payment Reminders sent by the Municipality of Milan. If you are a Municipality of Milan taxpayer you can also request it in the Municipality of Milan registry office.
The Regional Services Card (CRS) is a personal card that is issued by the Lombardy Region to all residents in the region. With the CRS (and your PIN) and a reader you can become a certified user of the Municipality of Milan portal.
The National Services Card (CNS) is a device (a card or a USB device) that contains a digital certificate of personal authentication. The CNS is a means of online identification that enables the use of public administration services.