@spyfy is it your view that the Nexus card should be included as a travel document? I remember reading elsewhere on the forum that people thought it just means passports and the like, so it would be great to know if Nexus should be listed as well.
Many thanks.
You need to list travel documents so that they can find your travel records (border crossings). If, when going to the US, you used nothing but your nexus card, then american and canadian border control will have your crossing filed under your nexus card and not your passport (how could they if you didn't even provide it).
It is likely that they will find your border crossing records simply based on name and date of birth but the more common your name is, the more important these documents get.
Just like a passport, a nexus card is a primary ID when crossing the border. You don't need to provide anything else. Therefore, in my opinion, nexus cards should be listed.
And as always: No one will return your application although you provided you nexus card, even if you didn't have to provide it. But it's different the other way around: Imagine the nexus card is required but you don't provide it.
So if in doubt, list the card.
