Hi,

I have been noticing a phenomenon over the last year or so... E-certificates that I have received for delayed flights or other reasons sometimes appear to be invalid, even though they have some time to go before expiry... I have verified that they strictly meet the ticketing requirements too...

Today I tried to use a PK065, PK036, and a PK039 and none of them were accepted... even though the earliest expiration was March 2007!

Is it possible that people may be trying successfully to use random numbers (maybe around one that they do have in hand) and using them up? I would like to hear if others have had a similar experience.