Originally Posted by
bocastephen
There is no checking of your secure flight inputs against your PNR at the checkpoint - just make sure your boarding pass name matches your ID name, although the absence or inclusion of a middle name on one or the other is not an issue. The screener has absolutely no way of knowing what information you gave SF - for all they know, you could have named yourself 'Baba Ganouch' on their system.
My DL has my middle name...my BP does not. No issues. I have not 'registered' for SF with my airline. No issues.
Well it's good to know that registration isn't required at this point. But, assuming it is someday, is there something wrong with just using my middle and last names? Both those names are on my drivers license and passport. But those documents also have my first name, which doesn't appear on much else. Any problems?