I've been getting mixed feedbacks regarding the F4 Visa process. I just recently went to the Korean Consulate to apply for a F4 Visa, and I could not because I did not have all my documents. I am a Korean-American that was born in the U.S.

Here are the documents I brought with me:

Birth certificate which shows my parents' names on it.
Dad's family registry
Parent's naturalization papers( Parents being US citizens)
Passport

I thought that was all the paperwork needed to be done.

But for some reason, they were saying that I needed more documents.

Can someone help me and give me information on what more documents I need?

I heard every Kyopo situation is different when it comes to a F4 Visa.