This Convention, signed on October 5, 1961, and commonly known as the Apostille Convention, simplifies the authentication process for public documents issued by foreign authorities. The Convention abolishes the traditional requirement of diplomatic legalization of acts and documents, replacing it with a standardized "Apostille" certificate issued by the competent authority of the country of origin to certify its authenticity. Italy and Turkey are contracting parties, making the exchange of public documents between the two countries easier.
https://www.hcch.net/en/instruments/conventions/full-text/?cid=41