I am being dim I know but...

[Coca]

If I am signing a letter on behalf of some one does it go lke this:

PP Mysignature

MR Big Important Boss

iyswim

no pp against MR Big Important Boss as you are signing on his behalf

Yes pp against bosses name

ah thankyou so much!

pp means, I think, per pro - on behalf of.

oh being doing it wrong all these years