Answer:
Sends paper without using the post office.
The more I appear The less you see. So riddle me this: What could I be?
What can you never get rid of when you lose it?
What gets broken without being held?
You can tumble in it, Roll in it, Burn it, Animals eat it, Used to cover floors, Still used beyond stall doors. Freshens whatever it is placed on, Absorbs whatever is poured into it. What is it?
I am a room that has a roof but no walls. What am I?