The following is the policy at Caesar's:
When I use room service, I sign to have them charge it to the room.
When I check out at Diamond services, I tell them to use my comp
dollars to pay for it.
They never remove the tax. I've tried to get it removed on 2 occasions.
The 1st time the clerk was familiar with the situation and told me
that she knows the tax is normally removed for comps but that "the
system" doesn't allow it.
The 2nd time both the clerk and the supervisor looked at me like I was
from another planet when I told them that comps are not taxed, and it
was obvious that I was wasting my time.