is it still installed on your system? If not, you will have to follow these instructions:
it is probably a good idea to phone them first...
(note that it may be cheaper and easier, considering the $10 fee and the shipping costs, to just buy another copy since Starcraft is very cheap now)
CD-Key missing or unreadable:
To verify ownership, you will need to mail in your CD case for the missing CD-Key. If the CD case is also missing, please send in the manual in its place. Mailing instructions are listed below.
Mailing Information:
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 can not send the replacement.
For all exchange situations a note is required that explains what happened, what is needed, your full name, your phone number, and a return address.
A $10 US dollar money order is required 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.
Please send all necessary materials to the following address:
Sales Department
Blizzard Entertainment
P.O. Box 18979
Irvine, CA 92623
If you feel that none of these options describes your situation or you wish to speak with the technical support department please call 1-949-955-1382 Monday through Friday from 9 AM to 6 PM Pacific Time. Please note that CD-Keys will not be given over the phone.