My passes finally came in the mail yesterday, and they screwed up and didn't send me a fan club lanyard. They even went so far as to take my invoice (where Fan Club - Yes) was printed, cross out the Yes, and handwrite a 'No' over it.
Pissed! Emails have been sent...
That means you failed the "Fan Club Check" they did. I heard they were 100% checking all orders against the FC membership list at LFL, but I thought it would boil down to an honor system tactic (ie you put down FC yes, they give you a lanyard without checking) because I thought there was no way they'd waste the time doing it.
I guess they actually did do the 100% check though, because yours is the third time I've heard of them rejecting someone who put YES and hand-changing it to NO.
For the first guy I heard about, well he thought he could say yes and no one would notice. Wrong.
The second guy said that GenCon said they couldn't prove he was a Fan Club member, so they denied him. He is under the FC with his first name, but uses his middle name as his everyday name.
Despite the address match between the two names, they gave him a hard time about it, thinking he was trying to use a family member's membership to cheat. He had to fax a copy of his DL to prove he was the same guy.

So, have your Fan Club mailing address and Hyperspace info handy and ready to go when they e-mail you back with a "we can't find record of your Fan Club membership" garbage...
Jeff