

The risks of aquiring pieces without proper documentation is highlighted by a number of "just returns", where stolen antiquities are returned to their country of origin, sometimes with encouragement from the courts.
- A 5th century B.C. Attic red-figure kylic, considered to be one of the museums finest pieces. Bought in 1983 from a European dealer it was later proved to have been illegally excavated from an Etruscan cemetery at Cerveti.
- A 2nd century A.D. copy of a head of Diadoumenos by Polykleitos. The museum aquired the piece in 1996, but it was discovered that it had been stolen from an excavation store room in Venosa.
- The torso of a 2nd century A.D. statue of thr god Mithra. Purchased in 1982 from a European dealer who claimed it had been in an English collection for many years. However, it was pictured in a grainy photograph, intact, as part of the Guistiniani Collection.