FlyerTalk Forums - View Single Post - Changing tickets but preserving upgrades?
Old Mar 2, 2020, 1:50 pm
  #15  
SamOF
 
Join Date: Oct 2007
Location: DCA
Programs: DL DM, AA EXP, various hotel
Posts: 2,227
Originally Posted by Often1
The "leave the FF number off" thing is an urban myth which was not a myth about 6+ years ago. DL now uses software to sniff this stuff out and the FFP is close to meaningless.
What are you basing this on?
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