w imieniu czyimś Englisch:

I am writing to you on behalf of my supervisor

Mr Kim, I am here on behalf of your sister.

I'm acting on behalf of Anna

on behalf of the Mayor.

I welcome you on behalf of the university.

He works on behalf of the client.

I'm calling on behalf of Mr Kowalski.

I'm writting on behalf of my brother

So I welcome this on behalf of the Commission and on behalf of the High Representative.

I'm writing this letter on behalf of my head of Department

Thank you for all that you've done on behalf of myself.

I’d like to say on behalf of the whole group that we wish you well in your new job.

I speak on behalf of all the teachers when I wish this year's students good luck.

I would like to apologise on behalf of my mother. Who gave you permission to speak on my behalf?

The employees manage the employing establishment on behalf of the employer.