What are the criteria for a username?

[+Delta68]

On a number of occasions, I have attempted to change a username and been told it's not available despite there not being an existing user by that name.
Why would that be?

 

Thanks
 

[+Mausebiber]

You can change your username to anything you want unless this name is already in use.

 

[+Hynz]

1 hour ago, Delta68 said:

On a number of occasions, I have attempted to change a username and been told it's not available despite there not being an existing user by that name.
Why would that be?

 

Thanks
 

Containing special not allowed characters maybe.

[+Mausebiber]

3 minutes ago, Hynz said:

Containing special not allowed characters maybe.

Yes, and of course no Usernames which are offensive, disrespectful, rude, vulgar ....

[+Smitherington]

One wonders at times the reason why someone would want to change their username. In this case there is an appropriate reason based on my research on Google.

 

“Uppercase delta (Δ) at most times means “change” or “the change” in maths.”

[+Delta68]

1 hour ago, Mausebiber said:

You can change your username to anything you want unless this name is already in use.

 

See original question.

 

[+Delta68]

1 hour ago, Smitherington said:

One wonders at times the reason why someone would want to change their username. In this case there is an appropriate reason based on my research on Google.

 

“Uppercase delta (Δ) at most times means “change” or “the change” in mat

1 hour ago, Hynz said:

Containing special not allowed characters maybe.

 

Which is what I was asking.

Is a space still allowed?

[Keystone]

Please see this Help Center article for guidance on characters that aren't allowed in usernames, including spaces.

[+Delta68]

6 minutes ago, Keystone said:

Please see this Help Center article for guidance on characters that aren't allowed in usernames, including spaces.

Spaces used to be allowed.

Why and when was it changed?

Edited July 14 by Delta68
typo

[+kunarion]

19 minutes ago, Delta68 said:

Spaces used to be allowed.

Why and when was it changed?

 

It was at least 6 years ago.  That's when I first was made aware of the change.

 

 

[+Max and 99]

 

[+Mockingbird559]

What about using CamelCase like this...ThisIsMyNewUserName   ? that usually works out pretty well

[Eagleman1]

This person should be banned because of that username

Edited September 4 by Rock Chalk
Removed the image because the content violates forum guidelines.

[+Max and 99]

Report them to Groundspeak. They take care of these things quickly!