CNN: Certificate of Non-Renunciation—What It Is and How to Obtain

The Certificate of Non-Renunciation (CNN) is the document used to attest that an Italian ancestor did not renounce citizenship or did not naturalize before the applicant's birth. It is often required as proof in citizenship-by-descent (jure sanguinis) processes to demonstrate that the transmission chain of citizenship was not interrupted.

Definition and importance of the Certificate of Non-Renunciation (CNN) in the Italian citizenship process

The CNN records the absence of a formal renunciation declaration of Italian citizenship by an ancestor, or the absence of a naturalization record that would preclude transmission of citizenship to the next generation. In practical terms, the certificate answers the question: “Was that ancestor an Italian citizen at the time of the descendant’s birth?”

• The CNN may be required by Italian authorities (comune/ufficio anagrafe), courts, or — for generations that still fall under consular jurisdiction — by Italian consulates. After the Tajani Decree (DL 36/2025, converted into Law 74/2025), consular competence for administrative requests was formally restricted to children and grandchildren of Italians; for later generations, the consular path is generally prohibited.
• According to the Ministry of the Interior, certificates relating to civil status and citizenship identification fall under local civil registry offices and the central system (see the Ministry of the Interior website: https://www.interno.gov.it).
• For applicants abroad, the MAECI and the consulates provide guidance on documents and legalization/apostille requirements (https://www.esteri.it).

Difference between CNN and other certificates:

• The CNN is not a birth, marriage, or death certificate: those documents prove family ties and dates; the CNN is specific to the citizenship status of the ancestor.
• It may be requested together with civil certificates to form complete evidence of the transmission line.

Who should apply for the CNN, legal basis, and timelines

Who typically needs the CNN:

• Descendants seeking recognition of Italian citizenship, especially when there is doubt about the ancestor’s naturalization.
• Guardians or legal representatives in cases involving minors or incapacitated persons.

Timelines and legal basis:

• The requirement and competent authority vary by case. Generally, the CNN is issued by the Italian authorities competent where the ancestor was registered (ufficio anagrafe / comune). In situations involving applicants residing in Brazil, the consulate can guide on consular procedures applicable to generations still falling under consular competence.
• Importantly: the Tajani Decree (DL 36/2025, converted into Law 74/2025) STRONGLY RESTRICTED administrative access to citizenship. Among the most relevant effects is the limitation of the consular path to children and grandchildren and the broad suspension of administrative recognitions in many comuni for foreign residents.
• Additionally, the decree has retroactive material effects on the right to citizenship: the legislative text has been interpreted and applied to hold that people born outside Italy who are NOT children or grandchildren of an Italian do not have, from birth, the jure sanguinis right that they might have previously had. This material retroactivity is a central and controversial legal issue, and is the subject of judicial debate. Those affected by this change should seek specialized legal advice (Italian attorney) and monitor decisions from competent courts.
• Note: processes filed BEFORE the decree took effect are expressly protected by the text of the DL/Law itself; the distinction between protection for prior proceedings and retroactive elimination of material rights is crucial.
• Processing times vary: from weeks to several months, depending on the comune, the consulate, and the complexity of the search; delays can occur due to historical archive searches.

Sources: Ministry of the Interior (https://www.interno.gov.it), MAECI (https://www.esteri.it), official publications in the Gazzetta Ufficiale, and legal coverage of the Tajani Decree.

How to obtain the CNN in Brazil: step by step, documents, and formats

Step-by-step (overview and guidance):

1. Gather Brazilian certificates proving lineage and dates (birth, marriage, and death certificates, as applicable).
2. Check whether a Haia apostille or other legalization is required; Brazil uses the Apostille under the Hague Convention — information on the Brazilian Ministry of External Relations site (https://www.gov.br/mre/pt-br).
3. Translate into Italian by a sworn translator if required by the Italian authority/consulate.
4. Contact the competent Italian consulate for specific guidance: each consulate has updated procedures and document checklists. Keep in mind that after the Tajani Decree, the consulate can only handle administrative requests for children and grandchildren; for later generations, the consular path is usually unavailable.
5. Depending on the case:
   • If the applicant is a child or grandchild and the consulate accepts, follow the consular route according to the consulate’s instructions.
   • For later generations (great-grandchildren and beyond), the consular route is generally not possible after the Tajani Decree; in these cases, consider pursuing a judicial path in Italy with a local lawyer. Many comuni have reduced or suspended administrative recognitions for foreign residents—confirm directly with the comune, but be aware that the administrative route may not be available in practice.

Commonly requested documents:

• Birth certificate of the Italian ancestor (if available).
• Brazilian birth, marriage, and death certificates proving the line of ascent.
• Documents proving naturalization or non-naturalization (when researched).
• Power of attorney or authorization when the request is made by a representative.

Costs, fees, and formats:

• Fees vary by consulate and comune; consult the consulate’s website for updated values.
• Some authorities issue certificates in digital format (authenticated PDF) and/or in paper with apostille or legalization. Check in advance which format the receiving authority will accept.

CNN and legal proceedings, validity, and common mistakes

Use with judicial action:

• The CNN can be part of evidence in a legal action in Italy when administrative or consular avenues are not possible. The judicial route still exists, but new rules and the issue of material retroactivity from the Tajani Decree can substantially affect strategy and legal grounds. Always consult a specialized Italian lawyer before choosing the judicial path; monitor decisions from the Sezioni Unite of the Court of Cassation (binding) and possible rulings from the Constitutional Court.

Validity:

• The CNN’s validity depends on the type of certificate issued by the Italian authority and the acceptance period by the receiving authority (consulate, court, comune). Always confirm the validity period with the receiving authority.

Common errors and how to avoid them:

• Sending documents without apostille or sworn translations when required: confirm requirements before sending.
• Not checking whether the consulate/court accepts digital certificates; request the accepted format.
• Ignoring the impact of Decree 36/2025 / Law 74/2025 on administrative pathways and material retroactivity: obtain information from official sources and consult a lawyer before starting the process.

Practical tips, monitoring, and the CNN’s impact on the citizenship process

Preparation tips:

• Digitize and organize a complete copy of the certificates in a chronological folder.
• Always have authenticated copies and sworn translations ready.
• Note the full names and spelling variations of the ancestors, as well as birth/registration dates and places—this aids searches in old archives.

How to monitor the request:

• Regularly consult the responsible consulate’s website/portal and maintain email correspondence with the competent department.
• Request a written protocol (protocol number) for every request; keep confirmations.
• If the request is filed directly at a comune in Italy, ask for information on processing times and contact channels of the ufficio anagrafe.

CNN’s impact on subsequent steps:

• The CNN can speed up proof of the citizenship line when it confirms the absence of renunciation/obstructive naturalization.
• When the CNN does not exist or is inconclusive, additional naturalization archive research may be required, or the judicial route may be the only viable option, especially after the restrictions introduced by the Tajani Decree.

To learn more about general rules for recognizing ancestry and legal updates, see our section on Cittadinanza italiana and follow the Notícias relacionadas about legislative changes and judicial decisions. For context on living and regularizing documents in Italy, see Vida na Itália.

The Certificate of Non-Renunciation is a technical document, but essential in many citizenship processes. Before starting the application, always confirm the receiving authority’s requirements — consulate, comune, or court — and consult official sources and specialized legal counsel.