Can someone else use my Gamertag after I change?

To clarify, it's not immediate, but it is made available for others. It takes time for the servers to update after you've changed your tag, but the length of time for it to free up is unknown.

Hi, I hope you're doing great out there despite the issue that you're experiencing. I am an Independent advisor and I am here to help you in regards to your concern.

After you have change your Gamertag into something else it will be immediately available to everyone.

[quote user="Iron5hock"]

Alright. This helped alot. Does anyone know if once a gamertag becomes available after someone changes it? And if a moderator sees this, can they remove my e-mail address from my post?

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Yes if you change the gamertag, it becomes available for someone else to use it, unless it was a Forced Name Change, in which case it will not become available.

Hello Tubularfool how are you?

My name is Ezequiel I'm an Independent Consultant.

I believe the Gamertag was used by someone else.

When you cancel your account or change your gamertag, your old gamertag becomes valid so that anyone can use it again, I believe the name is available and someone else took it and is using it.

Its quite simple. Once you change your GamerTag ANYONE can then select that GamerTag. You don't need to wait 10 years. I think some people are getting confused and are thinking about GamerTags that were made but not actively being used. There is a big difference.
GamerTags that are not being used actively are still tied into someones account and therefore not able to be selected. GamerTags that you voluntarily change become available right away. For example, if you wanted to change the casing of your letters in your
GamerTag you can change to something else, then change it back to the tag you had, and just change the lettering capitalization. It is the same tag you had just looks different. That right there proves that your tag is available to ANYONE to select once you
change it.