Originally Posted by AmericanMontrealer

I did use my NEXUS card but NEXUS card holders must still present their customs declarations and machine-printed card to a U.S. customs and immigration officer. It's much easier on the return to Canada, where I just walk from the NEXUS/CANPASS machine to the baggage belts and hand my customs declaration and NEXUS machine-printed card to the Canadian customs officer on the way out. Upon entering the U.S., the NEXUS card saves time in jumping the queue but doesn't eliminate the human review of the customs declaration.