Service Nationality - acquisition Last update on 07-07-2017 Information on how and where to make the application for acquisition of Portuguese nationality. Read more Who The applicant; The legal representatives of the applicant. When At any time within the opening hours of shops. Conditions » Documents and requirements . More info Legislation Law of the Portuguese Nationality. Regulation of the Portuguese Nationality. Other More information about the acquisition of Portuguese nationality can be found at IRN site . Competent authorities Institute of Registries and Notaries The information presented is the responsibility of the competent authorities. The contents were translated automatically by use of a tool that is not perfect in all situations. Please refer to the terms and conditions of the portal.