I just went thru the interview and got final approval on global entry. I'm leaving for a 3 week trip overseas on Friday, and may not get the global entry card in time. I know you can't use it at the kiosks, but does anyone know if I'm going to have any issues using Global Entry without activating the global entry card? The acceptance letter was conflicting. On one line it says you can't use global entry until you activate the card, and the next paragraph says you can use the kiosk immediately.

Thanks!