Here is something CBP definitely need to clarify on their renewal confirmation page on the website: you need to bring your passport. If you're an LPR, a driver's license and GC are not sufficient, even if they have a passport record in the website. They need to physically swipe it. It doesn't say anywhere on the TTP portal page that a passport is needed for a renewal interview but CBP were adamant about it a short time ago in Miami. Might seem obvious to some, but if it's not shown to be brought then there is a valid case for "it didn't tell me to bring it, so I didn't" but logic/common sense and CBP are not on the same continent.