I am currently trying to obtain a German passport, my mother is German and therefore I have a right to citizenship. However, German citizenship laws say that you can lose German citizenship if you apply and choose to take up another passport.
I obtained a U.S. passport while I was a minor, because my father held a U.S. passport and I was a legal U.S. resident, therefore I was automatically eligible as his child.
I have spoken with the German embassy in London (I am also British, by birth), and provided all relevant documents and they confirmed with me my eligibility for a German passport, however they require proof of how/when I obtained my U.S. passport to prove that it does not contravene the aforementioned policy about obtaining new citizenship.
That's where I'm having some trouble, I need documentation to prove that I obtained citizenship while still a minor. I became a U.S. citizen quite close to my 18th birthday so my passport issue date fell after my 18th birthday. I don't have any documentation from the process of getting my U.S. citizenship, so I'm at a loss of how to get the documents I need.
I looked up the process on the USCIS website, and it looks like a form N-600 would have been submitted. Is there some way I could get a copy of it from the government, or is there another document that would be able to provide the proof I need?
Update: If there is a way to prove when I received my green card, that might also suffice. As with that information I could prove that on that date I fulfilled all of the criteria to be automatically a U.S. citizen.