The Hague Apostille is a modality for legalizing academic documents. In countries that signed the Hague Convention of 5 October 1961 concerning the abolition of the legalization of foreign public documents, the need to legalize documents and certificates issued by foreign authorities is replaced by another formality: the affixing of the apostille. Therefore, a person coming from a country that has signed this Convention does not need to go to the Consular Mission and request legalization, but can go to the authorized internal authority designated by each State - and indicated by each country in the act of adherence to the Convention itself (normally it is the Ministry of Foreign Affairs) - to obtain the attachment of the apostille to the document. Thus perfected, the document is recognized in Italy.
The updated list of countries that have ratified the Hague Convention and the authorities responsible for affixing the Apostille for each of the States is available on the Hague Conference of private international law website: https://www.hcch.net