Originally Posted by
mre5765
When you get an X on your receipt, you have to go to immigration.
You walk toward the nearest passport control desk (which is usually yet another high priority line, often airline crew and diplomats) hold your receipt with the X clearly visible below your passport with the CBP sticker clearly visible and get the attention the CBP officer. He will serve your next (ahead of the diplomats in that line. ^).
Worked for me just fine. Added a whole 60 seconds to my processing.
I know. This is what I did. Maybe I wasn't clear. The first officer I spoke to was the one that marked my ticket with an "A".