Is the information about dues available in writing?

A letter from Steve Roberts, Organizing Director of TWU can be reviewed B6 Dues Letter. TWU has communicated their dues policy to us via email, conference calls, flyers and letters many times over the years. After speaking with Southwest, Virgin and Allegiant Flight Attendants, as well as meeting with TWU leadership numerous times, we can confirm TWU dues policy that has been communicated to us as the truth! There is no initiation fee, no retroactive dues and none of us will be paying dues until our first contract is accepted by us, JetBlue Inflight.