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NaDIAby Native Digital

NaDIA Digital Legal Adviser · Switzerland

Swiss law, with the source alongside.1

NaDIA answers your firm’s legal questions in clear language, citing laws, treaties and rulings. It knows the firm’s documents, writes letters on your letterhead and works on a computer in your office: client data stays there.

Try it with your own questionsWhere the data is
NaDIA

Question: A client has received their tax assessment. By when can they challenge it?

For direct federal tax, the taxpayer can lodge a written objection with the assessment authority within 30 days of notification1. The same time limit applies to cantonal and communal taxes, because the Tax Harmonisation Act imposes it on all cantons2. An ex officio assessment can be challenged only if it is manifestly incorrect, with a reasoned objection that states the evidence12.

To donote the 30-day deadline from notification straight away.

Sources

  1. 1RS 642.11 LIFD, art. 132“Contro la decisione di tassazione il contribuente può reclamare per scritto all’autorità di tassazione, entro 30 giorni dalla notificazione.”Fedlex(opens in a new tab)
  2. 2RS 642.14 LAID, art. 48“Il contribuente può impugnare la tassazione operata d’ufficio soltanto con il motivo che essa è manifestamente inesatta.”Fedlex(opens in a new tab)
Example from the product documentation, translated from Italian.

The law NaDIA consults, in six numbers.

All domestic federal law, Ticino legislation and the international treaties in your fields: double taxation, private international law, money laundering, social security, investment protection, free movement.

Legislation

  • 2’106federal acts and ordinances in forceFedlex · SR 1-9IT · DE · FR

  • 589international treaties in your fieldsFedlex · SR 0.x

  • 646legislative acts of the Canton of TicinoTicino law collection · RL

Case law

  • 202’500decisions of the federal courtsBGE, BGer, BStGer, BVGer

  • 67’000rulings of the Ticino courtsTicino case law

  • 6’064headnotes from the Rivista ticinese di dirittoRtiD

NaDIA

Figures as of 22 October 2026.2

Every night NaDIA compares the corpus with the official sources and imports what is new. Repealed acts drop out of the search.

The official text, one click from the answer.

In the answer, the time limit for an objection carries the number of its source. One click opens Article 132 of the Federal Act on Direct Federal Taxation (LIFD) in the official text, word for word.

NaDIA’s answer

For direct federal tax, the taxpayer can lodge a written objection with the assessment authority within 30 days of notification1.

SourcesRS 642.11 LIFD, art. 132

RS 642.11 LIFD, art. 132

Text in forceFedlex(opens in a new tab)

Presupposti

1Contro la decisione di tassazione il contribuente può reclamare per scritto all’autorità di tassazione,
entro 30 giorni dalla notificazione.

Six articles that apply to every answer.

NaDIA’s rulebook: sources, professional secrecy, corpus, the firm’s documents, languages and letters.

Article 1, Verifiable sources

Every statement carries its source.

  1. Paragraph 1: NaDIA numbers the sources it uses and refers to them in the text. One click opens the article or the ruling in the official text.
  2. Paragraph 2: If a provision has already been amended and the amendment comes into force later, the answer says so, with the date.
  3. Paragraph 3: Cited articles are checked: if a reference finds no match among the sources, NaDIA highlights it.

Art. 1 of 6

Everyday questions, with a documented answer.

A few examples of what fiduciary firms, family offices, trustees and law firms ask NaDIA.

Fiduciary firms

Taxes, VAT, companies, accounting

  • “By when must a tax assessment be challenged?”
  • “When can a company limited by shares opt out of the limited audit?”
  • “Which professional expenses can an employee deduct?”

Family offices

Succession, wealth, double taxation

  • “Which law governs the succession of an Italian citizen domiciled in Ticino?”
  • “Where is the dividend of an Italian company taxed under the convention with Italy?”

Trustees

Trusts, FinIA, AMLA, PIL

  • “What obligations does the Financial Institutions Act impose on a trustee?”
  • “How is a trust set up abroad recognised in Switzerland?”

Law firms

Procedure, case law, time limits

  • “What is the time limit for appealing to the Federal Supreme Court in civil matters?”
  • “How does the Federal Supreme Court assess abusive dismissal?”
NaDIA prepares the answer and the sources. The judgement stays yours.

From question to letter, in four steps.

  1. Question

    Write as you would speak to a colleague

    Even a follow-up to the previous question: NaDIA keeps track of the conversation.

  2. Search

    NaDIA consults the chosen sources

    Federal and cantonal laws, treaties, rulings and the firm’s documents, all together. Then it ranks the most relevant passages.

  3. Answer

    Clear text, numbered sources

    Federal and cantonal law kept apart, with risks, deadlines and practical steps highlighted.

  4. Follow-up

    Dig deeper or take action

    Open the full text of a provision, ask for a translation or turn the answer into a letter.

  5. Then a new question, following on from the last.

Ask in your own language.

NaDIA understands questions in Italian, German, French and English, and also searches texts written in another language.

  1. 01 Question

    Question in Italian

    Also in German, French or English: NaDIA answers in the same language.

  2. 02 Source

    Search in German too

    The Federal Supreme Court ruling written in German joins the sources.

  3. 03 Answer

    Answer in Italian

    The source stays in its original language. On request, NaDIA prepares an unofficial translation of the passage.

Measured quality.

0100

94%3

of the practical questions in our test bench find the right provision among the sources NaDIA consults.

84 hand-written questionsmeasured in October 2026

  • Every change is measured

    Before it goes into production, every change to the search engine runs through the same test bench: if it makes the results worse, it does not go in.

  • Limits are stated

    If a law or a canton is not in the corpus, NaDIA says so clearly.

  • The professional decides

    Every statement can be checked with one click on its source.

NaDIA grows with your work.

The next step is the law of the whole of Switzerland, canton by canton.

Available
1
TI
Being activated
19
BE, LU, UR, OW, NW, GL, ZG, FR, SO, BS, BL, SH, AR, AI, SG, GR, AG, TG, VS
Planned
6
ZH, SZ, VD, NE, GE, JU
Available: TI. Being activated: BE, LU, UR, OW, NW, GL, ZG, FR, SO, BS, BL, SH, AR, AI, SG, GR, AG, TG, VS. Planned: ZH, SZ, VD, NE, GE, JUZHBELUURSZOWNWGLZGFRSOBSBLSHARAISGGRAGTGTIVDVSNEGEJU
The laws of 19 cantons, 10’116 acts in German, French and Italian, have already been read from the official portals and are being activated. Today the law of the Canton of Ticino is available.

Coming next.

After cantonal law, the tools to manage mandates, documents and checks.

Features marked “being activated” or “planned” are not yet available.

  1. Being activated

    The laws of 19 more cantons

    • Choosing the canton

      In the chat you will choose the canton, or NaDIA will recognise it from the question.

  2. Planned

    Case law and practice

    • Cantonal case law

      Rulings of the cantonal courts alongside each canton’s laws.

    • Administrative practice

      Circulars from the Federal Tax Administration and FINMA, linked to the provisions they apply.

  3. Planned

    Analysis and compliance

    • Document analysis

      Contracts, articles of association and trust deeds read clause by clause, with the points to check and the relevant provisions.

    • Compliance and anti-money laundering

      AMLA and KYC checks on clients, with documented risk profiles.

  4. Planned

    Practice management

    • Clients and mandates

      One file per client and per mandate, with the team working on it and documents visible only to those who need them.

    • Drafting

      Drafts of contracts, letters and briefs, in German and French too.

    • Interface in four languages

      NaDIA’s menus and commands in Italian, German, French and English, for firms with staff from several regions.

Client data stays in the firm.

NaDIA works on a dedicated computer in your office, even without the internet.

Your firm

Dedicated computer

In your office

  • Language model
  • Search engine
  • The firm’s documentsEach firm sees only its own

Access from the firm’s computers, tablets and phonesEncrypted connection

Administrator, professionals and assistants have separate permissions.

Public sources

Only at night, to download updated laws and rulings

Cloud services

They receive neither your questions nor your documents.

Where the data is, in four answers.

Security and data, sector by sector
Where the documents are

On a dedicated computer, in the firm’s office.

Where processing takes place

On that computer: language model, search engine and documents.

What goes out

Nothing.

The internet connection is used only at night, to download the updated laws and rulings from public sources.

What is neither stored nor used for training

No cloud service receives your questions or your documents.

NaDIA in the other sectors

All sectors

Put it to the test in your firm.

We arrange a demonstration at your firm. Bring three real questions from your work: NaDIA answers in front of you, with the sources.

Try it with your own questions