US Immigration from Canada

Hi,

Are there any residency requirements for the american petitioner for the k1 visa? My fiance happened to be here in March when the border closed and his work went remote so he's been here about 6 months. He still has his apartment in the US and is still at the same US job, he's just been in Canada for a while. Does anyone know if there is any risk to him staying in Canada? I'm hoping I will have my interview rescheduled in late October and to move by November so he would stay here so we could move together but I'm a little worried about that causing any concern at our interview.

He's applied for an extension from the Canadian government so he's allowed to be here while we wait for my visa. I could bring a copy of that application as well where we had to prove he still had his american job and is paying for his US apartment, bills and had the intent to leave once I received my visa.

Now that interviews are being rescheduled, I would love to know who has been able to cross over by land with an approved visa (k-1 or spousal). Just wondering where they attempted and how it went. My fiance's visa was approved last week and on it's way and we are really nervous if he is going to have to fly or can drive ( he lives 1 mile from the Windsor/Detroit tunnel). The consulate told him to contact the border and ask before attempting but he wants to wait until visa is in his hands.

So we are years from even applying for my husband's citizenship but just to see what was required and what I needed to save for the next couple of years I was looking at the N 400. I saw that you must register with SS if you are 18-25 and my husband is 24, turning 25 next month. For some reason I never saw anything about this when we applied for the green card but I read USCIS may give information to SS. So do we need to register him or will USCIS do that? As of now there is no record of him but he just recently got his green card and his SSN still says only valid for employment.

If we do have to register him ourselves do we need to wait for a proper SSN with no restrictions?

My husband got his EAD this summer and shortly after was auto sent a SSN card (we did not apply for the SSN) that states only valid for employment. He now just recently got his green card and we are wondering will he get sent a new SSN with no restrictions or do we need to apply for one? Unfortunately the offices here are not allowing appointments except for new applicants with no SSN so in order to apply we would have to send his passport and green card so he'd be without both for a week.

My fianc e (the Canadian beneficiary) and I have been putting our K-1 packet together, and I've been reading all the guides, looking at examples and other people's finished packets, and I'm aware that proof of ongoing relationship is not required for the I-129F stage, but also that some people include it.

I've been gathering and organizing this material anyway (chat logs, video call screenshots, evidence of gifts and cards we've exchanged, conversations with each other's relatives) for her interview and so we can choose what we want to include now, but I know that Canada isn't a "high fraud" country and most reviews of the Montreal consulate describe the interview experience as very simple. Would there be any value in us including relationship evidence now, or should we save it for the interview stage? We have plenty of evidence to choose from, but I also don't want to bore the officer if it won't help at this stage.

For the record, I believe our evidence of meeting within the last two years is strong (passport stamp, boarding passes, tickets, receipts, my fianc e's I-94 record, a short letter of affadavit from one of my family members and one of hers confirming that we visited/met them/they're happy for us, and a selection of photos from our meetings with obvious landmarks/events in the background, meeting with relatives, and photos that match ticket stubs we're including); and for evidence of intent to marry, we're including our signed intent to marry letters and our engagement ring receipts.

Should we stick to this, or would it help to include any of the other relationship evidence at this stage?