1. The apostille applies to public documents executed in the territory of a State Party to the Hague Convention Abolishing the Requirement of Legalisation for Foreign Public Documents, concluded at The Hague on 5 October 1961, and which are to be produced in the territory of another Contracting State to the said Convention.

Are deemed to be public documents the documents listed in article 1(a), (b), (c), (d) of the Convention. This definition applies to documents executed by the following public services:

• Town councils
• Notaries
• Civil registry offices
• Public schools
• Parish councils
• Ministries
• ​Courts 

2. The apostile may also certify documents executed by private schools, provided the following formalities are complied with:

• Documents executed by private pre-school, primary and secondary teaching establishments must be first certified by the Direção-Geral dos Estabelecimentos Escolares (Praça de Alvalade, n.º 12, Lisboa; Telefone: 21 8433900; http://www.dgeste.mec.pt/);
• Documents executed by private higher education establishments must be first certified by the Direção-Geral do Ensino Superior (Av. Duque D’Ávila, n.º 137, Lisboa; Telefone: 21 3126000; http://www.dges.mctes.pt/DGES/pt).

3. Recognizing/certifying/authenticating documents drawn up by lawyers and solicitors (cases in which a copy of the corresponding professional licence must be enclosed thereto),or executed by parish councils, by commerce and industry chambers and by the Portuguese postal service may also be apostilled (article 1 of Decree-Law No. 28/2000 of 13 March 2000); articles 5, 6 of Decree-Law No. 237/2001 of 30 August 2001; article 38 of Decree-Law No. 76-A/2006 of 29 March 2006).