Blazer_knight,

Receiving the message "CD-Key in use by [another player]" may indicate that somebody else has used your CD-Key to install the game. Please note that the [name] listed in this error message is not a Battle.net account name but the name entered when the game was installed. If this [name] is not the one you entered, please reinstall the game to ensure the correct key is entered. If the CD-Key is still in use, you may need a replacement key. Please follow the steps below to request a replacement CD-Key.

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.

3) A completed Media Replacement Form, found here: http://us.blizzard.com/support/article/MEDIA_REPLACEMENT.

Please send all necessary materials to the following address:

CD-Key Replacement
Blizzard Entertainment
PO Box 18979
Irvine, CA 92623

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. Please 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.

Special Note for Warcraft III: The Frozen Throne users: You will first need to identify which CD-Key is in use. If your Warcraft III: Reign of Chaos CD-Key is in use, you will see a zero (0) in parentheses at the end of the error message on Battle.net. If your Warcraft III: The Frozen Throne CD-Key is in use, you will see a one (1) in parentheses at the end of the error message on Battle.net. Only send in the appropriate CD-case.

Please also feel free to check out some helpful information about CD-Key security at http://us.blizzard.com/support/article/20636

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.