WHO DREW A MONKEH ON MAH MAIL!!

You had time to post the question

Really? I always keep my stuff from every con. Even the con bag. The book, the schedule, all the smaller stuff I get from the dealer's den, all of it goes into little boxes labeled by year and stuffed into my "treasure chest". Every dragon needs his hoard right?

-Estimated six so far. Let's hope it doesn't go higher!

Well, we recommend you keep it. Consider the following conversation:
"Well, we don't seem to have you in the pre-registration book. How odd. Do you have your receipt?"
"Nnnnno, I left it at home."
"Well, did you make a note of your badge number? We can do a look up by that."
"It was one-thousand something. I think. I don't know it."
*deep sigh*

Now consider I've had this conversation in 2004. 2005. 2006. and 2007. I've had it enough times! Please preserve your pre-registration receipt, or at the least, preserve your registration email. It really does help you and us out if there's problems.

That said, it's not required you bring the receipt or such, and 99% of our Pre-Registered attendees have no troubles at all with presenting their Picture ID and getting their badge. Another 0.8% have very easily fixed troubles (Of the "You know, I thought a last name of 'Xavidson' was odd, but that's what you typed!" sort.) But there are always that tricky 0.2% who'd be helped by a receipt, and if they don't have it...