By law, I am required to have a written request before any action can be taken on your behalf.
No doubt they'll take action themselves on our behalf when they know the score.
"I don't want you to take such a risk on my behalf."
Once these documents are received by my staff, we will take the appropriate action on your behalf.
They'd never take any action on my behalf, but would back me up if I needed them to.
Another character often has to take action on his behalf.
It makes clear who can take decisions on their behalf, in which situations, and how they should do so.
Every time a community feels the effect of a decision taken on their behalf.
We hope you will take these issues forward on our behalf.
You are not required to take any action on his behalf.