Thank you Baikal3 and Jackolantern
Oh I'm in the process of collating a huge stack of documents lol.. Since my last post, I've got my dad's military records and high school records on the way from my lovely Aunt in the US.. I've got his birth and death certificates ordered and as of last night, I found my father's US social security number which apparently is his USAF number (not sure on the finer point of this yet).. I've also got a UK court case where my mum won custody of me from my dad officially in 1981 but this was due to his non-appearance.. I've got my UK based dual national half-brother on board (my father's son with another woman) in case it goes to DNA to prove paternity if needed.. Phew!!.. Obviously I have my own birth certificate and usual UK documents..
Is there any other conceivable thing I might possibly need that I've forgotten about?.. Mx
Yes, you always have to prove citizenship when applying for the passport, the difference is how many documents you need as proof.
Since you don't have the N-600 at this time, to prove your citizenship you have to submit a large stack of documents about your father's citizenship, marriage, the years he lived in the US, etc. But after you have an approved N-600, that certificate by itself is your proof of citizenship when applying for your next US passport (or other situations where you need to prove citizenship, such as applying for a US driver's license or a government job that requires citizenship), without having to dig up any documents about your father again.
Oh I'm in the process of collating a huge stack of documents lol.. Since my last post, I've got my dad's military records and high school records on the way from my lovely Aunt in the US.. I've got his birth and death certificates ordered and as of last night, I found my father's US social security number which apparently is his USAF number (not sure on the finer point of this yet).. I've also got a UK court case where my mum won custody of me from my dad officially in 1981 but this was due to his non-appearance.. I've got my UK based dual national half-brother on board (my father's son with another woman) in case it goes to DNA to prove paternity if needed.. Phew!!.. Obviously I have my own birth certificate and usual UK documents..
Is there any other conceivable thing I might possibly need that I've forgotten about?.. Mx