Bit of an odd question but this development has me wondering.

I am a Nexus member as a US citizen by birth. I am also a Canadian citizen by virtue of having a Canadian parent who moved out of Canada before I was born. A few years ago I decided to try and get my Canadian proof of citizenship, and it went through successfully a couple of months ago. I applied for, and got, a Canadian passport.

I called Nexus to ask them how to add it, and they said it had to be done at an open Nexus enrollment center, but as I already had Nexus and my US passport on my card, there was no particular reason to add my Canadian passport. There is also no requirement for a US/Canadian dual citizen who does not reside in Canada to show a Canadian passport upon entry either. This was validated as well by the Govt of Canada's Travel website: "If you are an American-Canadian dual citizen with a valid U.S. passport, you don’t need a Canadian passport to fly to Canada. However, you still need to carry proper identification and meet the basic requirements to enter Canada."

My questions are:
1. Is there any need to ever add my Canadian passport to my Nexus account? Note that I would not be replacing my US passport (which is where I live and still my primary passport), and that I would not be replacing citizenship on my Nexus card.
2. Is there any benefit to adding it? Or would it be a burden in any way (for example, could I be asked to show my Canadian passport by adding it to my Nexus card as a secondary document even though I would not normally have to show it to enter Canada)?
3. Assuming there is no downside to adding it, can I do so at an airport location without an appointment next time I travel through a Canadian gateway city? Or is that still unknown as they have not yet actually opened?

As of now, my assumption having spoken to the Nexus rep on the phone is that there is no need to add it, it probably can't hurt to do so at some point, and at the moment it can only be done at an open Nexus enrollment center.

I did try to add it at the GE center at Newark Airport figuring that they have access to the same systems but they said that they can't make any changes to Nexus members' accounts.

From what I know, the only thing you should do is carry the Canadian passport because it proves beyond reasonable doubt that you are admissible to Canada. However, you would only produce it as needed or upon request. As far as adding it to Nexus, it would be counterproductive as your card only displays one citizenship and as a U.S. citizen, you must declare yourself as such upon entry to the U.S., i.e., you must not declare yourself as Canadian when entering the U.S. but you may declare yourself as a U.S. citizen when entering Canada.

https://www.cbsa-asfc.gc.ca/services...ajour-eng.html states that you technically don't need to update info that won't affect your eligibility. So you can probably skip doing anything until your next renewal, at which point you should provide information about your Canadian passport, since Nexus requires that you declare all your citizenships, irrespective of which of them is needed for entry into the country.

I prefer to have things be up to date; this way, for example, when you renew, you wouldn't have to "add" a citizenship, and therefore it would be less likely that you'd have to do an interview due to a conditional approval. As you've discovered, there is no way to do this at a GE center. You should report to a Nexus enrollment center next time you're near one and have them add your Canadian passport to the system. Note that at the moment, only two locations are open in Canada, and both are land based crossings.

i had no problem updating both of my passports at the Nexus office at YYZ and a few years after that at the Whirlpool Bridge office (Niagara). No appointment needed in either place. However they were both renewed passports, not adding for the first time.

I got my Nexus many years ago however, at that time they were very clear that anything to do with passports should be added/updated asap. Perhaps that’s changed?

Please clarify the two bolded sections; seem to be contradicting each other.

First paragraph: "you don't have to right now"
Second paragraph: "but I would if I were you"

At least that's how I read it.

TSA PreCheck after Nexus
 

I currently have Global Entry with TSA Pre-Check approved, and I am not a US Citizen, Green Card Holder, or Canadian Citizen. Today, I got approved for my Nexus application based on my H1B & Canadian Permanent Resident card.
Now my question is, what will happen? Will I get TSA Pre-Check while traveling within the USA? The website says NON-Canada Citizen NEXUS members won't get TSA Precheck unless they are US citizens or Gren card Holders.

Should I accept and convert my Global Entry to Nexus or Go for Nexus?
I will be traveling between US-Canada, but USA domestic travel is more than between two countries,

Canadian website implies that if things change during membership that don’t affect eligibility, there’s no necessity to inform them.

Regardless, when you renew, you have to report all citizenships. My point is I would do it now, rather than wait, so that at renewal it doesn’t end up being an “addition” and therefore less likely to require an interview.

I've seen people here claim that one needs to report "all citizenships" for both GE and NEXUS but when actually applying I've seen n:o such requirement. There is certainly a dialog that lets people report additional citizenships, but nowhere that says doing so is required.

I actually e-mailed CBP after acquiring another citizenship to ask if I should stop in to add it to my GE profile....the response was that not only should I not report it, if I already put it in I should REMOVE it. This is in contrast to their website FAQs that say you should include all citizenships but make sure only US is included as "Proof you may enter the US".... so clearly there isn't even consistency within CBP... but at least i have some written proof I was told not to if an officer decides I should have. I did recently apply to add NEXUS though and chose to include the citizenship anyways since I'd rather over-disclose.

Where d:oes the GE FAQ state one should include all citizenships? Again, I've looked but have never seen this.

I remember seeing it when I did my renewal application last year, but that was the only place. First it asked if I had US citizenship, then it asked for any additional ones (not just Canada).

Definitely not required.

I was referring to this: https://help.cbp.gov/s/article/Artic...language=en_US
But you're right, it doesn't say you are required to report all, but gives instructions how to.

Well, the first section says US citizen (no other citizenships). Seems like it would be wrong to follow the instructions of this section if you are a dual citizen. That scenario is addressed further down the page and specifically says that you should add additional citizenships.