Trenitalia's Amica discount fare

-- With the "Amica" fare, you can have 20% off all medium- and long-distance trains (AV, T-Biz, ES*, ES* City, IC Plus, IC, ICN, and Express). The tariff applies to the tickets purchased until midnight of the day before departure, for a limited number of places for each train and for a spending of at least 10 euro. --

For details, see Trenitalia's New "Amica" Fare Gives a 20% Discount on Slow Travel Talk Italy