Originally Posted by
exerda
I know I'm responding to an old post, but given the poster is still active on FT... anyway, did you have GE at the time? Once I added GE/Nexus, my interactions with US agents never involve them stamping my passport (same for Canadian ones). Occasionally I have to speak to them--kiosks down, or a big "X" or "O" on my slip from the kiosk--but they stamp the slip, not my passport, when I do.
I have GE as a natural-born U.S. citizen, and I still get CBP passport stamps from time to time -- mostly when using the regular CBP lines or when handing over an APC kiosk printout. When using the GE kiosks, rarely do I get the CBP stamps.