In behalf of (someone) American British adverb phrase
This phrase can be varied in the form of "in someone's behalf", "on behalf of someone" or "on someone's behalf".
1. To represent or replace someone or an organization
The director has delegated his power to me, so in behalf of him, I will sign this contract today.
In behalf of my family, I would like to sincerely thanks all of you for coming.
2. For the sake of someone or an organization
Some citizens didn't realize what the authorities had done was in behalf of them.
Our organization's aim is to expand many free courses in behalf of poor children.