on behalf of (someone)
on behalf of (someone)
on behalf of somebody
,on somebody’s behalf
1 as the representative of somebody or instead of them: On behalf of the department I would like to thank you all. ♢ Mr Knight cannot be here, so his wife will accept the prize on his behalf.
2 because of somebody; for somebody: Don’t worry on my behalf.
3 in order to help somebody: They campaigned on behalf of asylum seekers.