Senority can not be manipulated. Your ID states your hire in date. The reason the date is on there is due to past manipulation and F/A's that lied about there date of hire to get to the front of the line at check in.
That can't true.
The date on my ID is my hire date at US Airways and not my non-rev date. My non-rev DOH is from PSA Express, and as a wholly owned carrier of US Airways I am entitiled to use this date for non-rev. My PSA Express DOH is the date listed in the computer as my non-rev date.
This date is used for non-rev only and not for the jumpseat. For the jumpseat you have a card that lists your hire date. Failure to bring the card results in you going last on the list for the jumpseat regardless of seniority.
My Mainline DOH is used for the jumpseat.