Comment by devilbunny

> no risk in submitting false documents

Except the risk you'll miss your flight, which in most cases is the screw that is turned.

My wife and I both have RealID driver's licenses. She had to get a replacement, and apparently the machines used to print them for mailing out later (as opposed to going down to their office and getting a replacement in person) are just ever so slightly off - so her license won't scan. She was given a surprising amount of harassment on a flight not long ago over this matter. She got me to take a photograph of her passport and send it to her so she could show it on the return trip - where her license again failed to scan. This is a fairly well-documented problem. Reports from all over the country have it, and it always seems to be certain license printers that just fail.

So now she carries her Global Entry card, which is otherwise only used for access to the expedited line for land and sea border crossings but is a valid RealID in itself, for domestic flights. It scans correctly.