FlyerTalk Forums - View Single Post - What does "Open" and "Closed" mean on an upgrade cert?
Old Dec 13, 2014 | 3:37 pm
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MSPeconomist
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OPEN means available for use. IIRC they used to switch to USED or something, IIRC when the upgrade was requested, and then become CLOSED after the travel. They drop off the list when they expire IIRC.
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