I know that award tickets use the XF denomination for the fare basis when they are issued in First Class. I just issued two UA awards (both in First for 3 class of service aircraft) and only one ticket uses the correct XF designation.
I was going to ask the UAL ticket office why the difference (ie. why this other ticket has F as the fare), but gullible me cant resist to fantasize that I will get mileage credit just because it doesnt read XF..... LOL
Any experiences....???
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Gaucho100K