How to remove your Minecraft Forum account
Minecraft Forum uses Curse for its accounts.
To delete your Curse account, go to https://curse.cursesupport.com/tickets/new and select the appropriate option (for a free account, “delete non-premium account”.
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Minecraft Forum and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Minecraft Forum using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Minecraft Forum. Click here to find out how.