US Immigration from Vietnam

My wife received an email with her interview appointment at Ho Chi Minh US Consulate but we haven't received an interview letter in the mail. The email says we need to bring the letter to her medical exam and to the interview. Do we just print the email and bring to both appointment?

I (Vietnamese-American (M)) am currently in the process of submitting my I-129F application to USCIS for my Vietnamese national fianc e (F).

My fianc e's parents would like to have a religious tea ceremony as soon as possible in Vietnam. Under Vietnamese law, Vietnam does not recognize a wedding as a legal (bona fide) marriage unless there is a valid marriage certificate or document on file with the government. Is USCIS knowledgeable in the laws for a specific country (Vietnam)? If I were to go through with filing a I-129F instead of a I-130, will USCIS be following Vietnamese law, or can they still deny us on their own account for being "too married" regardless if it was bona-fide or not.

Essentially, if my fianc e and I have a big ceremony for all of her family and friends (and mine as well, as we are both Vietnamese), but do not file for a marriage certificate (non bona-fide marriage), will we still be fine for a K-1 Fianc e Visa? Or will we be denied and would have to petition/start all over.

Thank you so much!

For the Cho Ray Hospital (CRH) or The International Organization for Migration (IOM) medical examination locations is there a way to schedule an appointment for the medical examination online or would it be scheduled by physically going there?

I would like to know if it s possible for my wife who is waiting for her greencard approval if she can open a personal bank account for herself? Or does she need to become a US citizen first?

My wife applied and sent out her AOS packet (application for greencard, work permit and travel docs) back in May, and as of today she checked her status online and it says Case closed. Does this mean that her travel docs wasn't approved? We are nervous as we tried to take our time to make sure we filled out everything correctly before mailing. Once we received the notice, it was instructions and location for her biometrics appointment, which she did attend and do, so I'm not sure why she's getting this message. Here's a screenshot of what it says.