To be able to transfer gift cards redeemed on the wrong account to the correct one.

Hi there Jane,

Thanks for reaching out. I'm sorry to hear about the issue with redeeming the gift card on the wrong account.

What type of gift card was it? (Currency/Subscription)

Unfortunately, if the gift card is for Microsoft Currency you will not be able to transfer or refund. The funds will get attached to the account it was redeemed on.

Hope this helps.

Hi

If you have used a card that adds funds to your account if you cannot get this transferred to the correct account you may be able to gift content to the correct account and a 25 digit redeem code will be sent for the gifted content.

https://news.xbox.com/en-us/2017/11/16/game-gifting-now-available/

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community.

Hello Vanessa, unfortunately after a code has been redeemed it is not possible to transfer it from one account to another, if it is an ideal game is to put the account as principal in the console so that the correct account can have the game, if it was a Gift card, make a purchase as a gift to the correct account of your son.

Hello AlfieBaird! I'm Kris and I'd be happy to help you with your question.

Unfortunately, you are unable to refund a gift card that has been redeemed. Xbox Support are unable to transfer across accounts.

"Important Before you redeem your code, make sure that you're signed in to the correct Microsoft account on your device or browser. Codes that are redeemed on the wrong account cannot be transferred to another Microsoft account by Xbox Support."

Source: https://support.xbox.com/help/subscriptions-billing/redeem-codes-gifting/redeem-prepaid-codes

As smwutches mentions, you cannot transfer the money between accounts.

However if I the same region, you can use the money to purchase games as gifts you can redeem on your other account.

Or if you shop at microsoftstore.com you should be able to use your account balance to purchase another gift card to redeem on the correct account. This may vary by region however.