US Immigration from Canada

Hi guys! My fianc , the petitioner has Jr in his birth certificate but his passport and drivers license omit his suffix, what do we have to do or put in the I-129F form? Do we use the JR next to his last name and go with what's written on his birthday certificate?

appreciate all of your answers.

thank you

Hi guys!

So a little background: I moved to Canada when I was 15, now I am a Canadian citizen (and older than 16 lol), and I still have my citizenship from my birth country (expired passport tho). No criminal record.

According to the packet pdf, I should only get a police certificate from Canada, since I lived here from 16. Is that correct? Or should I also get one from where I was born? Looking at the US gov site for Montreal, it says "any countries where you lived for more than 12 months" but does not specify from what age?
Has anyone who wasn't born in Canada but hasn't lived anywhere else since turning 16, can confirm they only gave the Canadian police certificate for the k1 interview?

Thank you (-:

Hi guys I have a quick question. How do I change my DS-160 after booking an appointment? Could I just print out a new DS-160 and bring this to my interview? I called a few numbers and I wasn't able to get a clear answer. I am just wondering how much of an issue will this be at the interview.

Hello, I've been in the process of filling out the I-129f and organizing my evidence. I was just wondering if i'm including chat history from apps like Discord or Whatsapp where our usernames are not the same as our real ones do I need to include those usernames as an alias in part 1?

I just learned that both myself and my 7 year old need Covid19 vaccines ( done in the last 12 months) as well as seasonal influenza (flu shot) done.

Does anybody have more information on this? How strict is this? Is there any flexibility in not getting these done and proceed with medical exam?