Depends on what your talkin about but usally onbehave
You use on your behalf when you are representing me and in your behalf when you do not want to put a lot of emphasis on what you are saying.
in behalf of is incorrect usage (Delete me if I am worng)
"Representatives" is a noun. It refers to individuals who are chosen to act or speak on behalf of a group or organization.
A behalf is an advantage or favour, to do something on someone else's behalf is to do it in order to someway assist them.
"On behalf of my friend, I would like to apologize."
It should be: Ms. Martinez' behalf or Mr. Martinez's behalf
On Behalf of the Streets was created in 2006.
I spoke to the company on behalf of my colleague who was unable to attend the meeting.
If someone is not available to speak for themselves, a person might say "on the behalf of *so and so* I would like to thank you...", or "on the behalf of *so and so* I am informing you...", or "on the behalf of *so and so* I am requesting...".
If someone is not available to speak for themselves, a person might say "on the behalf of *so and so* I would like to thank you...", or "on the behalf of *so and so* I am informing you...", or "on the behalf of *so and so* I am requesting...".
The term 'on behalf' is a prepositional phrase; the noun 'behalf' is the object of the preposition 'on'.The noun 'behalf' is a word for the benefit or the interest of; a word for a thing.A pronoun is a word that takes the place of a noun in a sentence.