Where can I find the Secure Verification Code (CSV) on a Tax Agency document?

The Secure Verification Code (CSV) is printed at the end of the first page of each document.

This code guarantees the integrity of the document by checking the electronic office of the State Tax Agency.

The CSV must be treated with due care by the recipient of the document; its communication to third parties would enable them to access the contents of the document, as well as to carry out, in relation to the notification received, certain electronic formalities.