To clarify: your first task is to find a United agent who is willing to take a look at the reservation in the Native SHARES system for you, and who will fix this problem where it exists.

As mentioned above, fully 9 out of 10 United employees will absolutely shut you down and refuse to help with this problem. I don't know whether it's that these people are lazy, or if they just have a completely false belief that TSA runs Pre-Check and therefore they as United employees can play no role in getting your Pre-Check information associated with your United reservation.

What we've had to do is keep asking. We call the helplines repeatedly, try to escalate to supervisors, try to explain what part of the record needs to be checked, et cetera. If someone is unwilling to help you, you just have to get yourself transferred to someone else. I'm not sure why there is so much resistance, but it's been an ordeal. We've had more luck with demanding help at the airport customer service desks than over the phone.