Isaiah41

I was approved 2 weeks ago on K1 visa, they never asked for my partner's passport. They want to see your documents especially the
*AFFIDAVIT OF SUPPORT AND ITS SUPPORTING DOCU.
* Your own civil documents: passport, birth certificate, police clearance, medicals
* proof of ongoing relationship would include call and chat history, plane tickets to prove that u have met in person, hotel receipts etc
I went with my partner's passport copy, birth certificate (lol) but sorry they are not interested in that cos they already have her details. They want to know how well u know your American partner so carrying her passport is like cheating in exam cos her date of birth etc are there so you can easily answer the questions.
But carry everything you can and only present what you are asked for.
Cheers

One more thing: DONT VOLUNTEER INFORMATION EXCEPT IF ASKED!!!!! You don't want to come out too COCKY that can put you in a long drilling interview.
Mine lasted for less than 5 mins and the CO never asked me for one proof of relationship and I didn't bother telling him I came with a truck load of evidence, I just walked away, what matters is that you have the VISA, not how smart you were to get it.