Certified email has the same legal value as a registered letter with acknowledgement of receipt.
To certify transmission and receipt of a certified email message, the email manager sends a receipt that constitutes legal proof of the transmission of the message and of any attached documentation. Similarly, the manager sends the receipt of successful (or failed) submission with a time stamp to the sender
Thanks to the Public Administration Index, the official archive of Public Bodies and Public Service Providers coordinated by the Agency for Digital Italy, it is possible to consult and extract certified email addresses of any public body. Each PA is obliged to set up a certified email address for each protocol register and communicate each address to the Agency.