Cannot redeem Xbox Live 12-month tokens

Got exactly the same problem, cannot redeem the 12 months live code.

You will need to call support. Once you have verified the adult account, they should be able to cancel the 12 month subscription and issue a token to the email on file for the full 12 months, assuming this happened recently and not like a month or so ago.
Once you get the token, you would be able to redeem it on the proper account, just make sure you double check before doing so.

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Additionally, if the parent account already had live time and you stacked 12 month on top of what it already had, you may need to let the agent you speak to know this, so they can make sure they properly split up the live time owed so that the adult account
can get what they had left while still getting that additional 12 months as a separate token. Hopefully that makes sense.

Howdy.

One other possibility to consider: Be sure to check the product description at the vendor where you purchased the codes. Some of the 12-month Game Pass subscription codes work on a "12-month token" basis, and only one token can be active on a Microsoft
account at a time. In the case of the 12-month subscription tokens, they do not stack.

To my understanding, if your codes are, in fact, 12-month subscription tokens, you would wait until the first 12-month token expires and then you would enter another code to extend your membership another 12 months.

I don't know whether your situation involves the 12-month token subscriptions codes, but I quote the following product description from a currently popular offer for 12-month Game Pass codes for illustrative purposes:

"This is a twelve-month subscription to Xbox Game Pass. 1 per Microsoft Account Entry per year. If a customer has more than one Xbox Game Pass 12 Month token in their possession, they can hold the additional tokens and enter them in every 12 Months
from initial date of entry."

If you purchased a 3 month or 12 month subscription, call support. They should be able to cancel the gold on your account and give you a token to redeem on your son's account.

I ve got such problem too. the tech agent proposed to delete my 12 months subscription and sent me new token codes...but when I try to redeem them there is an error...