To do something for someone else.
On behalf of
On Behalf Of
politics somebody acting as a diplomat on behalf of a national government or sent as an official messenger on behalf of a higher authority
the action of speaking or acting on behalf of someone
the action of speaking or acting on behalf of someone
I wonder if the letters are in fact pp which stand for Latin pro persona and mean for the person of or for and on behalf of. Secretaries and personal assistants often use this when signing letters on behalf of their boss.
Intercession is a noun meaning intervening on behalf of another or saying a prayer on behalf of another person. A synonym is meditation and intervention.
Poor English on behalf of the author.
If you mean 'to order for/on behalf of': pedir en nombre de
Intereceded means to plead on another's behalf or act as mediator in a dispute.
A lawyer represents and defends his or her client. In court this can mean speaking on their behalf, presenting evidence to the jury on their behalf and generally convincing the jury and judge of his or her client's innocence.
If you mean "behalf" as in "the interests of a person, group or principle" - some other words could be: sake, stead, benefit, advantage... I don't know if that was what you were looking for, though...