Portuguese Nationality for a Child of a Portuguese Citizen Born Abroad – Adult (Modelo 1C – Maior de Idade)
Blank form for an adult born outside Portugal to apply for nationality on the basis of having a Portuguese mother or father. Includes guidance on filling it in.
Official form: Modelo 1C · Instituto dos Registos e do Notariado
What it is for
- Applying for Portuguese nationality based on descent from a Portuguese parent
- Regularising the situation of someone born abroad who was never registered as Portuguese
What it is
This is the IRN (Institute of Registries and Notary) Modelo 1C as applied to persons of full age, born abroad, who are children of a Portuguese citizen, under the terms provided by law. It is not for grandchildren of Portuguese citizens or for those applying on the basis of residence. The form is the application and does not, on its own, grant nationality.
What you receive
You receive the official blank PDF form, with an explanation of what it is for. The Titus assistant answers your questions about filling it in. You can combine it with other documents in the same request, with a single payment. We do not ask for any password for forms.
The assistant explains; it does not fill in or submit anything on your behalf. Do not type passwords or third parties' data.
Things to note
The form is provided blank; the applicant fills it in and signs it. The documents proving parentage and any deadlines should be confirmed with the registry office. We do not submit the application or guarantee its approval.
Frequently asked questions
My mother is Portuguese but never registered my birth. Is this the right form?
It may be the right route, but it depends on your specific situation. The Titus assistant can help you read the form, and the office will confirm whether your case qualifies.
How does it differ from the Modelo 1C for minors?
The wording and the details requested are designed for the applicant's age. There is a separate form for children under 18.
Related documents
Blank form to apply for Portuguese nationality for a minor under 18, born outside Portugal, whose mother or father is Portuguese.
Portuguese Nationality for an Adult Grandchild of a Portuguese Citizen (Nacionalidade portuguesa para neto de português – maior)Blank form for an adult to apply for Portuguese nationality as the descendant of a Portuguese grandfather or grandmother. Comes with a filling-in guide.
Text reviewed in November 2026.