Originally Posted by
aa_chitown
No worries, I actually had this happened to me on a flight to DCA 2 months ago. You get a boarding pass called " priority verification" the negative to this, is i actually didnt get a boarding pass, so i hopped into the elite first class line, and had the lady behind the counter, release my upgraded seat and printed a boarding pass so i could go through security..
Again, just so we're clear, the OP asked about printing a BP or some sort of verification
online (before he arrived at the airport.) This cannot be done without a seat assignment. If the OP had had time to go to the ticket counter to have the verification printed, he would have just kept the upgrade and had the TA print his boarding pass.