What characters are never in an Xbox code?

Xbox digital codes never contain the following characters: A, E, I, O, U, L, S, 0 (zero), 1, or 5. Microsoft confirms this in the error message itself. If you see any of these when entering your code, you are misreading another character. Common confusions include B and 8, G and 6, Q and 9, D and 0 (zero never appears so it must be D), and Z and 2. Always copy-paste your code directly from your email at redeem.microsoft.com instead of typing it manually to avoid these errors.