Originally Posted by
dgcpaphd
If the passport data is not correct, TSA precheck can be negatively affected.
That can't be correct.
The info. that goes to TSA for Secure Flight most definitely does not include passport info - that is what they match to for Precheck. Don't know if this list is 100% complete, but believe for Secure Flight, they require name, gender and DOB (and of course, trusted traveller (PassID) number or Redress number, if applicable). Don't think they need anything else - when coming through the checkpoint, your name on the ID you use is supposed to match exactly with what they have on file through Secure Flight, and if the name on your TT card is different than the one you have on your ticket, yes, that can cause problems with getting precheck.
But that's different than passport. Plus, if they required passport info., millions of people who travel domestically wouldn't be able to do so without having a passport, and there are lots who don't.