Ask the registry for the right copy
The ruling is a judgment of the court, so the copy must come from the registry that holds the file, the cancelleria in Milan. Ask for a certified copy carrying the note that the ruling is final and no appeal is pending. Anyone asking how to legalize a Divorce Decree needs that wording, because a registrar abroad looks for it before anything else. A copy without it is sent back.
The clerk signs and seals the copy by hand and binds the sheets. Do not unstaple it later to photocopy a page, since the binding is part of what the next desks check. Read the names, the dates and the case number against your other papers while you are still at the window.
Why the Procura signs it
A judgment is a judicial act, so it is legalized by the Procura della Repubblica at the court whose district gave it. The Procura holds the signatures of the registry clerks and matches yours before stamping. Papers issued by the town hall or a state office go the other way, to the Prefettura (Prefecture). The consular legalization of a Divorce Decree in Italy is built on the Procura stamp, so that has to come first.
What the mission adds
Then the bundle goes to the embassy or consulate of the country where you will use it. Their officer checks the Italian seal against a sample, stamps the file, and often records it. The embassy legalization of a Divorce Decree in Milan is arranged with that mission and no one else. Several ask for a copy of your passport and a short letter saying what the ruling is for.
A seal is not the same as recognition
The stamps in this chain say one thing only: that the signatures on the paper are genuine. They say nothing about whether another country will treat your divorce as valid. That second question belongs to the registrar or the court abroad, and they settle it under their own rules. Ask them what they need beyond a sealed copy.
Cost and clock
The Italian leg needs a €16 tax stamp (marca da bollo) on the file, plus the registry's own duty for the certified copy. The mission then charges a consular fee that it sets and revises without notice. Buy the tax stamp at a tobacconist before you set out.
Set aside 10–15 business days for the full chain. Where a remarriage date or a hearing is fixed, a lane of 3–5 business days is open. The mission's diary still decides the last step, so take the earliest slot they offer and plan the rest around it.
Who asks for it, and what else they want
People legalize a Divorce Decree in Milan to remarry abroad, to change a name on a passport, to sort out a residence permit, or to settle property in another country. A registrar wants the finality wording. An immigration desk wants your name spelled as it is in your passport. A property lawyer wants the part that divides the assets. Ask each of them what they will keep.
The destination sets the rule on that last seal, so ask the office that will read the file to put its answer in writing. The embassy attestation of a Divorce Decree in Milan is time thrown away when the registrar abroad is happy with the court stamp. Ask which language the copy must be in as well, and whether the translation has to be bound to it.