OK. Here's my problem. My father was born in 1944 to my grandmother Luigia Canepa and Enzo Ganna. In 1945 my grandfather died and in 1949 my grandmother remarried Mario Peirano. My "grandfather," Mario adopted my father, thereby oblitterating any evidence that Enzo Ganna was the father. My father and I carry the last name Pierano.
(My grandfather, Mario, became an American citizen in 1946, after my father was born.)
However, according to documents, my father was born out of an extramarital affair.
Also, on the marriage certificate between my grandmother and grandfather (Luigia and Mario) my grandmother still has the last name Ganna. (They were married in the US.)
I have both marriage certificates of grandmother (between Enzo and Mario) to show continuity of last name, Canepa-Ganna-Pierano.
My father and I were both born in the US and my father's birth certificate bears the name Mario Peirano as the father of the child. According to Italian law, I can claim citizenship through my grandfather. However, my concern is that the consulate will call into question the fact that my father was "technically" born out of an affair.
There is no way to prove or disprove he was adopted, as all records are sealed and names on birth certificates are changed.
It's a complex problem, but I would like some feedback. Thank you!