‘With all due respect’ is a fantastic phrase
It sounds like one is being polite but can just as well mean ‘With all due respect (ie none at all, you noisome turd)’.
( Monty Boyce, My cheese game is strong, Wed 22 Sep 2010, 15:21, 2 replies, latest was 15 years ago)

you saw right through me
you noisome turd
( Vipros. clever got me this far, then tricky got me in, Wed 22 Sep 2010, 15:22, Reply)

I am really hurt by this.

( Monty Boyce, My cheese game is strong, Wed 22 Sep 2010, 15:25, Reply)

splendid!

( Vipros. clever got me this far, then tricky got me in, Wed 22 Sep 2010, 15:29, Reply)

i am banned
from putting it in letters to the other side for this exact reason.
( rachelswipe with a fork, Wed 22 Sep 2010, 15:25, Reply)

that amuses me
I suppose you have to assume that not all of your clients are idiots and that some might understand that you mean "with no respect"

edit: not clients I notice now.
( Vipros. clever got me this far, then tricky got me in, Wed 22 Sep 2010, 15:30, Reply)

You corespond with the dead?
You solicitors never give up, do you.
( Bartleby A dead man on vacation, Wed 22 Sep 2010, 15:31, Reply)