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Registries (IRN)PDF form

Application for Change of Sex and First Name for Young People Aged 16 and 17 (Requerimento de Mudança da Menção do Sexo e do Nome Próprio – Menores de 16 e 17 Anos)

Blank application for young people aged between 16 and 18 who live in Portugal and have Portuguese nationality. Includes guidance.

What it is for

  • Requesting a change to a young person's sex entry in the civil register
  • Requesting a change to the young person's first name
Example (fictitious). The family of Titus Gorila, aged 17, is preparing the application so that the registered name and sex match their identity.

What it is

This is the IRN (Institute of Registries and Notary) application for minors aged 16 or 17 who live in Portugal and have Portuguese nationality. It seeks a change to the sex entry and first name in the register. It is not the adult form, and the application is subject to the specific conditions for this age group.

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.

Titus assistant
Do you have questions about this form? Ask, for example, what a field means or who should sign it.

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 to be completed and signed by the persons indicated on it. Additional requirements for minors should be confirmed with the office. Titus Docs does not submit the application or guarantee that it will be accepted.

Frequently asked questions

What happens when the young person turns 18?

The form for adults then applies. If you are deciding when to apply, it is advisable to ask the office which form is appropriate at that time.

Who signs the application?

Whoever the form itself indicates. The Titus assistant explains what each signature field means, but does not sign on your behalf.

Related documents

Text reviewed in November 2026.