To sign on behalf of my boss, usually write pp, What does it mean by p.p.
Anon, perhaps you could cast your eyes up just a touch to the post just above yours.
Signatures on behalf of anyone, regardless of who they are, as long as you have permission to sign on their behalf. The pp goes in front of their name and your signature in place of theirs.
Yours faithfully,
Your signature
but if it means 'through the agency of' it's through the agency of the Superior..
so it would be :
My Signature,
'through the agency' of My Boss, Esquire