FlyerTalk Forums - View Single Post - UA Website Can't Distinguish 0 and O in Confirmation Codes
Old Jan 10, 2013 | 2:31 pm
  #4  
mherdeg
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In case anyone is wondering, United actually does use both O and 0 in its PNRs — I just had a look through my long list of "cancelled" trips on united.com and found a mix of both characters, including one where the PNR is OY90EG. (I've changed the other letters slightly.)
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