If you are "stuck in an ATR" a copy of the form from the faa for your ATP written as in the above post and a copy of a signoff on your latest checkride.. or any paperwork you and your chiefpilot can come up with to prove same should do. The best is if your PC is coming up soon and you can have the checkairman give you a copy of the paperwork he submits or sign off the PC in your logbook.. especially if he/it states you passed as PIC. The paperwork/logbook copies are a huge part of the process.. spent the last few days before heading over worrying more about that than the interview..