Portuguese Citizenship

Portuguese citizenship is ruled by Law No. 37/81, of 3 October, last updated by Decree nº 26/2022 of march 18th.
 
The aforementioned diplomas and the other legal grounds related to the subject and, therefore, also applicable, are responsible for establishing the hypotheses for the purposes of applications for nationality, either by attribution or by acquisition, as well as the rules applicable to the marriage and divorce of foreigners with Portuguese citizens, in addition to the registration of death, occurred in Portugal or abroad. 
 
In certain cases, it is necessary to carry out a prior process of issuing duplicate certificates or, even, carry out a search for the place where the certificates are registered. 
 
In most cases, the certificate is the starting point for processes of rectification of information before the civil registry, whether in Portugal or abroad, as well as in the actions of recognition of judgments handed down in the context of other legal systems than the Portuguese.