I was born in Canada but became a US citizen through my US citizen father at birth. My father lives in the US, so I came down here to acquire proof of my US citizenship (which of course I now have!)
I have now noticed DHS put a stamp in my Canadian passport with a date I have to leave (this is the first time I have ever gotten a stamp!) so I assume it is a Visa stamp, although I was never asked about my US citizenship or went through any application except a question on why I was coming to the US, in which I said "To stay with my father."
This date has now been overstayed.
Now I want to apply for my US passport, and have all the necessary documentation proving my US citizenship, although my only photo ID will be my Canadian passport with an HSC stamp with a date that I have overstayed.
Will this stamp somehow affect my application process? The passport website says nothing about valid visas for US citizens born abroad, but I have read that a US citizen MUST enter the US with a US passport. What is the best way to go about acquiring my US passport?