I came across a mention of the RES document — I can’t figure out what it actually is. In Milan both documents are obtained from the Chamber of Commerce. Is it the same in other cities, or is that just a Milan thing?
In Milan, at the Chamber of Commerce you get both the certificate of financial parameters and the nulla osta — you only need to have the latter legalized at the Questura afterwards. In other regions it varies: in some places the Chamber of Commerce issues only the certificate, and the nulla osta is obtained separately at the Questura. So it’s not purely a Milan thing — it’s just that there both documents are in one place, which is more convenient.
Bring your active registered individual entrepreneur (IP) registration and invoices with you — they don’t need a bank account. Proof of IP registration is often requested, and it’s advisable to have a registered rental contract by that time — they asked me for that at the Questura in Milan as well, although in theory it’s not required at the first fingerprint appointment. ATECO activity codes are also needed for attesting financial parameters.
“Camerale” is the extract from the Chamber of Commerce (camera di commercio) — if a sole proprietor isn’t registered there, you need the certificato di attribuzione della partita IVA (certificate of VAT number assignment), which is a different document. In Milan, when I renewed mine they asked for both, although in theory one of the two should be sufficient — better to check with the Questura (police headquarters) exactly what they need.
By the way, at the Chamber of Commerce (camera di commercio) you can also get an access card to your personal accounts — INPS, the tax office and a few other government services. It took 15 minutes; you need a passport, a codice fiscale and a P.IVA (VAT number). It costs €25. You can get it in any city, not necessarily where you registered your sole proprietorship.
In Como I booked an appointment online via the Chamber of Commerce (camera di commercio) website — there are no walk-in queues, you pick a time and show up. They asked for copies of our passports including the visa pages. For the financial part they checked taxes paid in Italy for last year — we had about €8,500 — and I also brought a bank statement for €17,000, but they didn’t seem to even open it.
When I applied for my first residence permit they also asked me for registration with the Chamber of Commerce (iscrizione alla Camera di Commercio), even though according to my ATECO that shouldn’t be required at all. At the Questura in Turin they just requested it and that was it, no explanations. So it’s better to have it on hand in advance — you never know exactly what they’ll ask for.
I was refused the issuance of the tessera sanitaria — it turned out the problem was with my codice fiscale. It had a foreign residential address registered, and they said they won’t issue it until I change it to an Italian address. They sent me to the Agenzia delle Entrate. So if you’ve just arrived, check the address on your codice fiscale first, otherwise you’ll waste the trip.
In Turin, when I was applying for the tessera sanitaria, they also required the ricevuta, the type D visa for self‑employment, the housing contract with its registration at the tax office, and the codice fiscale with an Italian address — the day before that I had specifically gone to the Agenzia delle Entrate and updated it to a Turin address. They gave me a temporary one for six months; I also requested the card, which later arrived by post.
Regarding the financial parameters - at first they told me those weren’t needed for my profession either. I said the document is on the consulate’s list and is required in any case - in the end they changed the activity code from consultant (consulente) to another one, and then they issued the attestation without questions. So if they say “for your ATECO it isn’t required” - double-check; sometimes it’s just about how the activity code is written.
You can get the residenza before the first permesso di soggiorno, but it will be uncertified. For a certified one you need SPID or PosteID, and those aren’t issued without an identity card — and you can’t get the card before the first permesso. So you end up going in circles. They say that in some comuni they grant residenza even without a permesso, but it depends on the specific municipality; I haven’t checked it myself.
In Rome the chamber of commerce also issues two documents — a nulla osta to carry out the activity and the parametri. But a nulla osta from the chamber is not the same as a nulla osta from the Questura — it only says that they don’t see any obstacles to the activity based on your ATECO codes, nothing more. And another point that few people take into account: if you offer consulting or other services, that’s the activity of a self‑employed professional (libero professionista) and is not subject to registration with the chamber — that’s what the commercialista (tax consultant) explained to me. The chamber can perfectly well refuse both the nulla osta and the parametri, citing precisely that. So the Milan arrangement with two documents in one place is convenient, but it doesn’t work for all types of activity.