To apply for Portuguese citizenship based on first degree descent, birth certificate of the applicant and birth certificate of the Portuguese parent will be needed.
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How can I obtain Portuguese citizenship through a DNA test?
I would like to apply for Portuguese citizenship. My father is was born in Portugal. My mother and him were not married. He was not a legal citizen and didn't want to sign my birth certificate or be on it. Therefore he is not on it. I am planning to do an avuncular DNA test to prove paternity in the U.S., as he passed away in 2015, as well as both grandparents. Will this be accepted for me to apply for citizenship? What else could I do?