Those students enrolled in a PhD programme who are EU nationals do not need a residence permit for Italy. All they need to do is register (registrazione anagrafica) at the public records office (Anagrafe) of the Municipality (Comune) of residence.
It is mandatory for stays longer than three months. Documentation to present: identity document; certificate proving the availability of sufficient economic resources for the stay (it can be done through self-certification); certificate proving the purchase of a health insurance policy that covers health costs; certificate of enrolment in the PhD course.
The Municipality issues a certificate to the interested party proving the filing of the registration request.
Citizens from a country not belonging to the European Union must apply to the Embassy or the competent diplomatic authority of their home country for an entry visa to Italy for study reasons (type D for postgraduate study) valid for stays longer than three months.
To obtain an entry visa, is also required the pre-registration on Universitaly portal.
After the publication of the admission rankings for doctoral programmes, the candidates who were granted of a position with or without a scholarship or admitted as a supernumerary, need to request an admission letter for the purpose of obtaining the entry visa, by sending their request to dottorato(AT)unifi.it.
Detailed information on the competent reference authority in your country and on the documentation to be submitted for the entry visa application is available on the website of the Italian Ministry of Foreign Affairs (Ministero degli Affari Esteri e della Cooperazione Internazionale - MAECI).
Non-EU students admitted to doctoral programmes must apply for the residence permit, within 8 working days of their arrival in Italy by submitting the necessary documentation ("kit") to a Post Office, where you also pick up the kit to be filled in; more information and costs on the Poste Italiane website (in Italian). After the presentation of the kit, the date for the appointment will be communicated to the Foreigners Office of the Police Headquarters (Questura) for the issue of the residence permit for study purposes (to be renewed every year).