If I am authorised to sign a letter on someone else's behalf what do I write?

(after my signature and before their name?)

it should be some sort of abbreviation, something like p.s.

can anyone help??
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Comments  (Page 8) 
You put "p.p." in front of the name of the person for whom you are writing the letter -- p.p. stands for "per pro" (for and on behalf of).

p.p which is a latin word for "per procurationem"

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people! the correct way has been explained a gazillion times on this post.....if you're still confused. wait for your boss to sign!
Actually it depends on where in the world you are. If in Canada or the US, signing a letter on behalf of your supervisor or co-worker in a corporate setting would look like this

Yours truly,

DOE Corporation

John Doe

JD/yi (your initials in lower case letters)

If not a corporation, you may sign with

Yours truly,

John Doe


I have never seen a letter signed with p.p. and I have worked in a law firm in Canada for over 10 years. Obviously, you should always check company policy before signing anything.

Good luck!