This code can't be redeemed / not valid in your region

The account country and the code's country do not match.

That code has already been used

Redeemed before. Tell us within 14 days for a replacement or a refund.

A typing slip, or the code was entered with lower-case letters. These codes are 25 characters, upper-case and digits.

Xbox

An Xbox code goes to a Microsoft account. The console only matters in that you are signed in with the right account on it.

1On the console: press the Xbox button, go to Store, and select "Redeem code".
2Type the 25-character code. Capital letters and digits only; there are no lower-case letters in these codes.
3Confirm on the summary screen — it names the product before anything is spent.
4A Game Pass or Gold code extends the subscription on that account; a game is added to your library.

Or from a browser, signed in to the same Microsoft account:https://redeem.microsoft.com

This code can't be redeemed / not valid in your region: The account country and the code's country do not match.
That code has already been used: Redeemed before. Tell us within 14 days for a replacement or a refund.
That code isn't quite right: A typing slip, or the code was entered with lower-case letters. These codes are 25 characters, upper-case and digits.