system
Given the following post, respond as if you're commenting on Reddit:
human
[Death Note] What happens if someone legally changes their name, does the death note match names based on legal names or innate names?

So let's say someone legally changes their name would that make  it so that name is now what kills them in the note or is it still their old name, and does it have to be a legal name change? Does the death note like base itself on if its just a name that has been chosen but not legally changed or it has to be legally changed. Does it have to be based on like an innate feeling of the name? Does the death note have any policy for names?
gpt
The Death Note requires / the Shinigami see a person's true name.  This is explicitly not tied to any legal name register. The details of what happens when someone changes their name are sparse, but it seems to be tied to the soul's sense of identity implying:  
  
If you legally change your name and don't tell anyone just to try to avoid the Death note, it won't work.  The user will simply write whatever name you go buy that used to be your legal name.  
  
If you hate your name for some reason and change it, and no longer respond to your old name, the name needed to kill you will be the name you chose whether or not you legally change it.