> For the complete documentation index, see [llms.txt](https://changelog.matrixemulator.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://changelog.matrixemulator.com/welcome/server/muserver/dataserver/badsyntax.md).

# BadSyntax

<mark style="color:green;">Whitelist/blacklist of forbidden words or phrases in character names — used by the DataServer during character creation, name availability checks, and name changes.</mark>

```
//Syntax
"forbidden word"
end
```

### <mark style="color:yellow;">Notes</mark>

* If the name (during creation, availability checking, or changing) contains any term listed here in any position, the operation is refused.
* This filter runs on the DataServer, so it always applies regardless of which GameServer is connected — it acts as an additional layer beyond the GameServer's `FilterRename.txt` (which only applies to the name change command and only within that specific GameServer).