Hi Devesh Patel
Welcome to English Forums.

Please write what you would like to tell him and post it here. Members will check it for you.

reqest to approval for unpaid salary payment paid to other person....?

It is not clear as to what you want.

Do you ask your manager to pay you the salary which has been due for some months?

yes.

From

Date

To

Dear Sir

I would like to inform you that I have not been paid my salary for the months of .................

I would very much appreciate if it is paid at the earliest.

Thank you

Yours sincerely