Steam CDKey Reset Steps
If you receive “Duplicate CD Key” error message, you must contact Steam Support to have the CD Key moved to your account. Please contact us through our online support system as outlined here:
You must have a copy of your valid purchase receipt from within the last 90 days to have the CD Key moved to your account.
We do not accept receipts from online auction websites or used software vendors. If you do not provide a valid purchase receipt, Valve will not be able to transfer the CD Key.
We do not reset CD Keys which have been disabled for violations of the Steam Subscriber Agreement and/or End User License Agreement or banned by VAC for cheating infractions.
If you still need assistance in activating your CD Key, please follow this link to create a support case and provide the following materials:
A scan or digital photo of the CD Key with the words Reset To and your Support Ticket Number written in permanent ink on the reference card or sticker (without obscuring the CD Key)
Your Support Ticket Number (a 12-character alphanumeric ID in the format 1234-ABCD-1234) is assigned when you submit a ticket.
Submit your initial inquiry, then you may reply to the ticket with your image attached.
A scan or digital photo of your retail purchase receipt (game must have been purchased within the last 90 days – we do not accept receipts from online auction websites or used software vendors)
CD Key Scan Examples
If you are unsure of what CD Keys are used on Steam, please see this guide
Here is a typical example of a CD-key reset attachment. Please write your support incident number on the reference card. (You must first create your support ticket, copy the incident number then submit an update to the ticket with your digital photo of the CD-key.)
Contacting Steam Support
Please see the Contacting Steam Billing and Support topic for instructions to contact Steam Support to provide the requested information once it is ready.