FlyerTalk Forums - View Single Post - Dual Inventory Fares - Is there an idiot's guide anywhere?
Old Apr 17, 2018 | 11:53 am
  #13  
Swanhunter
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Originally Posted by teledude
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i have upgraded DIFs using avios and GUFs and both were simple as normal
lucky you - both of mine required a long (10mins + call) with holding and a supervisor intervention.
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