Have you called NW to see if the codes had already been "used".... I know of one FT'er a while back who told me about the algorithm used in the cert numbering process where it was easy to predict the numbering sequence and use other numbers in the series... I think this is where many of the e-bay "certs" come from...
Originally Posted by spc354
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....