Can I merge an old account into a new one?
1263
How can one link / merge / combine / associate two accounts / users? (Anonymous / unregistered / cookie, or Google / Facebook / registered)
67976
Is it possible to transfer your Pokemon Go account to Trainer Club?
147088
If I change my avatar (or profile/user image) can I return to the old one?
157604
How to reset main user account?
31155
What would happen if someone who is suspended created a new account and tries to have it merged it later?
151170
Transfer settings to new version of Blender
64196
Change user associated with Google Drive account (OSX) when old account does not exist
120146
If I delete 1 Apple ID (email address) will the same email addy become available to use again?
71644
How can I remove existing duplicate accounts and records at once?
125693
Deleting Individual SE Accounts
127724
Change Email and password + New Account
72390
Delete an old Facebook account
20868
How can I delete my account?
142312
How to have separated but vinculated multiple Ubuntu One accounts?
5404
How can I log into two different accounts on two different sites now (July 2015)?
62538
Sync accounts with different SO/SE profile (not the oldest)
121417
Can I transfer trophies and data to a new account?