Formerly known as the Estado da Índia this territory was an integral part of Portugal (as distinct from a colony) under Portugal's Constitution of 1910.
On 19 December 1961 India invaded and annexed the territory. The annexation was not recognized by Portugal (or the United Nations) until 1975, at which time Portugal re-established diplomatic relations with India. The recognition of Indian sovereignty over Goa was backdated to 19 December 1961.
Portuguese nationality law allows those who were Portuguese citizens connected with Goa before 1961 to retain Portuguese nationality. Acquisition of Indian citizenship was determined to be non-voluntary at the time.
One practical obstacle is that the civil records of Goa were abandoned by Portugal during the invasion and hence it can be difficult for descendants of pre-1961 Portuguese citizens from Goa to prove their status.
You can apply for portuguese citizenship if:
1. You were born in the erstwhile portuguese territories of Goa, Damao, Diu, Dadra and Nagar Aveli during portuguese rule – up until 1960;
2. If your are the son or daughter of anyone born in the erstwhile portuguese territories, regardless of where you were born;
3. If you are married to a portuguese citizen.
4. If you adopt by a Portuguese citizen
5. The rights of those born in the aforesaid territories during portuguese rule are garanteed by registration of birth, in Portugal.
6. The registration of person born in the territories during portuguese rule can be applied for, even if the person is deceased.
7. If alive, he or she should apply in person. If not, one of the descendants may apply.
Registration of this and all other pertinent facts in the portuguese civil registration service (registo civil) is a must in order to ensure portuguese citizenship for the descendants.