Originally Posted by
sbpeat
Just make sure that the flight you're on is 2 class instead of 3 class as the KUP's book into the next higher cabin from coach. For 2 class planes this is obviously to domestic first class but this credits as First miles / tier points (the instant uprade books into class P for info).
The confusion might have arisen as 'K' is indeed a discount economy code with BA. Maybe she heard K when you said KUP, maybe she doesn't know about these fares etc etc.
Another way to verify this is after you select the itinery and move on to the pricing screen you'll find each segment listed has "Cabin / Booking code" entry. You're looking for "First" and F, P or A (typically P) as the booking codes. If you follow the "fare rules" link below the price calculation there will typically be a lot of remarks about First and it will be pretty obvious it's not a coach / economy fare.
I believe AA now only has one domestic aricraft type (767-200) with a 3-class layout, so be careful of anything where the equipment is 762. Finally, also be careful of any short international flights to Mexico, Canada etc. because a lot of these are sold as Business not First and get less TP's.