Who may swear the translation
Only a court-sworn translator can put this paper through the oath. The person who wrote the Italian text is the person who stands at the desk and signs the asseverazione, the short sworn statement that the two texts say the same thing. You cannot swear it on their behalf, and a bilingual relative cannot stand in. A certified translation of a Translator's Affidavit in Italy rests on that one signature, not on a letterhead or a company stamp.
At the oath desk in Bari
The oath for this city is taken at the Tribunale di Bari – Ufficio Asseverazioni, Viale Saverio Dioguardi 5, 70124 Bari. A Tribunale is the ordinary court of the city; the asseverazioni desk is the counter inside it that handles sworn translations. A second route runs through the Giudice di Pace di Bari, the justice of the peace court, at Viale Europa 73. The two sit in different parts of the city, and each keeps its own counter hours.
How the bundle is bound, and what the stamp covers
The clerk binds the file rather than reads it. Source text, Italian version and the signed oath sheet are joined as one object, and the join is stamped so that no page can be lifted out or swapped later. That stamp says a named person swore an oath on a named day. It does not grade the wording, and it makes no promise about what an office abroad will do with the file. An official translation of a Translator's Affidavit in Bari carries a traceable oath, not a seal of approval.
Cost, timing and the notary step
Work is priced by the page and runs at roughly €30 per page, with a standard window of two to four business days and a faster 24 to 48 hour route when a court or consulate date is close. Because the affidavit is a private act, get the signature witnessed by a notary or solicitor before anything else; the court works from the signed paper. Ordering a certified translation of a Translator's Affidavit in Bari after that step saves a second trip through the whole chain.