on one's behalf

In fact, generally speaking, I would say that it’s almost always more productive to try to change one’s own expectations and behavior than to expect others to change on one’s behalf.

Things to watch for, observed Carlos Perez – research and development practice lead for information technology consultants TrustedSec – are primarily “phishing emails, USB drives left around waiting for a curious person to plug and even phone calls where a person is tricked into downloading and running a piece of software on one’s behalf.”

As Dartmouth professor Darrin McMahon explains in his fascinating book Divine Fury: A History of Genius, the word dates back to ancient Rome, where it was used to describe a spirit or familiar, able to intercede on one’s behalf with the gods.

It's always difficult to quantify a captain's impact, leaving only the outcome to argue on one's behalf.

“And selling access is not qualitatively different from giving special preference to those who spent money on one’s behalf.”