Publishing with Pen Name?

When you write a query letter, do you use your pen name when you sign off, or do you mention your real name? Or do you sign off with your real name but mention your pen name, or vice versa? Or do you just write about your pen name in the query letter?

I think that's pretty self explanatory.

Thanks xx

I've always signed/seen it as "Real Name, writing as Pen Name"

and then often when you're doing title pages (if the agent/publisher asks for one) it has a spot of pen names

-Title
-Genre
-Word Count
-Name
-Pen Name
-Contact info

What Aria said. My queries were all done under my real name and stated I was writing as Voirey Linger. Contracts are also made under my real name.

Look up I Should be Writing Interview with Gail Carriger, she covers this--there are several types of ways to get a pen name. So yeah, depends.