I received a reply from Angela in the local tourist office. "as for luggage storage services, Central Parking may be the best option if you plan to leave your luggage for the day. They are located a few steps away from the train station, in Via Piero della Francesca 45, just 200 mt at the left of the train station. (Telephone number +39 345 348 9033). Price 1E every hour or 6E all day."
"As an alternative we can also keep your luggage in our office during our open times, but please note we do this service informally. We are not provided with locker rooms or luggage insurance policies, but the service is free of charge."
Orario - Uffici Turistici "Benvenuti ad Arezzo"
Piazza della Liberta 2 (Palazzo Comunale/City Hall)
aperto tutti i giorni/everyday: 10:00 - 16:00/ 10am - 4pm
ph.tel +39 0575 401945 - +39 0575 377678
Piazza Grande/ Sotto Le Logge Vasari
aperto durante Fiera Antiquaria/ during Antique Market
sabato e Domenica/ from Saturday to Sunday
09:00 - 18:00/ 9am-6pm
tel/ph +39 0575 377468
David