STEAM GUARD
Redeem on the website first. Only sign in to Steam when the page says it is your turn.
Open the redeem page
Open the redeem page sent by the seller.
Enter or paste your single-use code
In "Your code", enter the 12 characters received with your purchase, with or without dashes, and click "Redeem code".
Wait for your turn
If another buyer is signing in to the same account, the page asks you to wait a few seconds. Do not sign in to Steam before the page lets you.
Sign in to the Steam account
When the page says "Sign in to Steam now", use the login and password received from the seller and check "Remember me". Steam will ask for the verification code.
Copy the Steam Guard code and enter it in Steam
The 5-character code shows up on the redeem page within a few seconds. Enter it on the Steam screen and confirm as soon as it appears.
Unable to access? Contact the seller and request your code manually.