Originally Posted by
nomad1972
NEXUS cards do require activation to work in Canadian NEXUS terminals. Activation is not required to use Global Entry, as the physical card is not required.
The activation button reappears once the card is printed and mailed out.
The GE card should be activated within 30 days if within the next 5 years you envision returning to US via Canada/Mexico land border in a NEXUS/SENTRI lane.