You can only redeem them if you have a XBOX 360 console if not try to see if you can get one from a friend or something. They are good to at least 2025 so.
I did open, there is no expiry date on this card. I called MS again and this time got someone more helpful, they opened a case took some details of the points package and will be calling me back today.
Open them up and there will be an expiry date in the back of the card
Thanks, may have to see if I can find a friend with a 360.
Google & Reddit to the rescue Unless you still have a 360 in the house, you appear to be stuffed. Bear in mind, that article is about 18 months old, so might be even that route has gone.