In Animal Crossing: Wild World, how do you change your name for when you post on the bulletin board?

Question

I've seen people post on the bulletin board using different names than the person they were using (where it says "Written by _____") and I was wondering how.

Answer 1

You can't, what you saw could be writen by someone else.

Answer 2

I think if you use the last line of the letter you can write in your own closing and therefore change your name.

Answer 3

You can't.