on (one's) behalf
For the benefit, interest, or support of someone; as an agent, representative, or in place of someone. Our lawyer will be telephoning the department tomorrow on our behalf to ensure our application goes through as planned. This decision is on your behalf, so don't act so ungrateful!
Is it correct to say on my behalf?
There are two correct ways to form this phrase: on my behalf. on behalf of me.
What is correct on my behalf or in my behalf?
A: Both expressions are correct, but they mean slightly different things. I discuss this in my book Woe Is I. “In behalf of” means “for the benefit of” or “in the interest of.” “On behalf of” means “in place of” or “as the agent of.”
