If your Canadian passport is still valid you should use your Canadian passport.

The NEXUS Card is not proof of citizenship. However, some officers of both border agencies will sometimes accept it as such. You can try using it if you are driving across the border, but there is a good chance you will be turned away. Use your Canadian passport or renew your American passport.

You should explain it at the interview. Most likely you will not be denied but it is up to the officer.

You should have renewed your passport before you applied for your NEXUS Card.

Now, you will have to update your NEXUS membership with the new passport:

• If you have the new one already, bring it to the interview.
• If you don’t have it yet, you’ll have to go back to an enrolment centre once you do.

There are no temporary NEXUS Cards. You will have to travel back to Alberta using the normal security lines.

It might be. You should disclose this during your interview.

You should check again in 48 hours or so. If there’s still an issue, contact the enrolment centre where the interview was held to see what’s wrong.

If you certified your application, you must correct the mistake at the interview.

If you have not yet certified your application, log in to your TTP account to make the change.

Provided you got your irises scanned when you applied for your NEXUS, and provided your card is not expired, you can use it at airports equipped with NEXUS or Global Entry kiosks.

Yes, your cards are still valid until they expire.

It should be updated but, to me safe, travel to your nearest enrolment centre to make sure the passport is updated.