Foxpro
I think double dipping will be more difficult. It seems that at least AAdvantage used to just takes the flights at face value and credit them (back in 1996). Now they get the partner airline to process them (or so they claim). Of course, if you want to send it in and they want to process at face value.....
[This message has been edited by terenz (edited 12-22-1999).]