on somebody's behalf
US /ɑːn ˈsʌmbədiz bɪˈhæf/
UK /ɑːn ˈsʌmbədiz bɪˈhæf/

1.
bagi pihak, atas nama
as a representative of someone else
:
•
She accepted the award on her father's behalf.
Dia menerima anugerah bagi pihak bapanya.
•
I'm calling on behalf of my client.
Saya menelefon bagi pihak pelanggan saya.