Question about the NCLEX ATT

Hi there to everyone! I'll be taking the NCLEX in Hong Kong this September. I have printed my ATT from the email that was sent to me. But the thing is, I have heard that you have to present the ATT that was mailed to you through snail mail. They say that you won't be allowed to take the exam by just having the printed ATT from the web. Is this right? On that note, how long will I receive my ATT through snail mail if I received my ATT through e-mail last June 16, 2006? Thank you very much!