I first encountered the concept of Hell as a bureaucracy from Piers Anthony. His Incarnations of Immortality series is another that Helena would recommend.

Incognito: So, are you Satan?

Baalberith: Of course not. I’m just a minor demon.

There are lots of us; there have to be, because we deal with the paperwork.

And Hell is a bureaucracy.

Incognito: Makes sense.

Baalberith: Follow me.