If you have the original key, you can send it in and get a free replacement. They'll disable the old one at that time.
Blizzard Entertainment can only assist with North American English versions of our games. For international version assistance contact your local distributor using the International Contact information found here: http://us.blizzard.com/support/article/21373.
Please mail the following materials:
1) The CD Case. If the CD case is also missing please send in the manual in its place. If you have the manual or the CD case, then you DO NOT need to send us the CD. If you do not have the CD case or manual, then the CD itself can be sent in. In this case please package the CD carefully; we are not responsible for any damage occurring from mailing the CD to us.
2) A $10 US dollar money order payable to Blizzard Entertainment is required for each CD-Key to cover processing costs; no personal check or cash will be accepted. If it has been less than 90 days since you have purchased the game and you include a copy of the sales receipt showing the purchase date within 90 days, the $10 fee will be waived.
There will be no charge to replace your CD-Key as long as you send in the original CD case with the original CD-Key sticker attached to it. The $10 money order requirement is waived if the requested case with original key is provided. You will need to mail in the CD case for the replacement CD-Key to the PO Box listed above in these circumstances. All other submissions will require the money order for the processing fee.
3) A completed Replacement Packing Form (found here: http://us.blizzard.com/support/article.xml?articleId=24683.)
Please send all necessary materials to the following address:
Irvine, CA 92623
We suggest you use some form of tracking to make sure your mail gets to Blizzard Entertainment. If we do not receive your package we cannot send the replacement. We process all requests in the order they are received and will be addressing your replacement issue as soon as possible after receipt of these items. If you use tracking you can keep updated on when we receive it.
I still have the original CD Case and the original CD-Key sticker attached to it. However number 2 concerns me, If we are not able to send a check or cash how are we supposed to transfer the $10? Since I still have the original CD Case and CD-Key do I need to worry about the $10 fee or should I just disregard it? On the Media Replacement Form it says I need to supply my Blizzard/Account Login, Is this referring to the account I used to log into this forum? Or my Battle.net Account?