FlyerTalk Forums - View Single Post - Using OLD UA Mileage Plus Number
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Old Nov 29, 2017 | 6:38 am
  #5  
TerryK
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Originally Posted by 1P
There's your problem. The UA MP numbers are three letters + five numbers. Is your third letter a capital O and you thought it was a zero?
Older accounts have two letters plus six digits; newer ones have three letters plus five digits.
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