Specific entry rules for each country are available at ViaggiareSicuri
Mandatory Travel Documentation
All persons travelling to Italy from any foreign location are required to provide a self-declaration to the carrier or, upon request, to law enforcement officers.
Travelling from (or returning to) Italy
Specific rules for each destination are available at ViaggiareSicuri
Find out more:
For specific questions about Italy, go to online inquiries
Documents you need to travel in Europe