"sent on behalf of" is correct and usable in written English.
You can use it when you want to indicate that you are sending something (such as an email or a letter) on behalf of someone else. For example, "I am sending this email on behalf of my manager."
In one piece sent on behalf of both candidates regarding the ACA, the ad features pictures of a smiling white family and a black doctor, and thanks them for voting against health care exchanges in Arkansas, saying they will cost states between $10 million and $100 million a year.
His choice of career has been bolstered by his correspondence with a serving soldier in Afghanistan who replied to the letter Jake put into one of the welfare boxes that his gran sent on behalf of her WI group in Prestwood, near Aylesbury.
"These scam emails purport to be sent on behalf of the Civil Aviation Authority.
They told the police that they had been sent on behalf of Islamic Jihad.
This meant that the text message appeared to have been sent on behalf of SMSGlobal's client.
The funds, sent on behalf of South Africa, were apparently for use on its Caribbean diaspora legacy programme.
Prevent the signals those proteins send on behalf of a cancerous mutation, and the cancer itself screeches to a halt.
Colleges already see this information on the official transcripts that high schools are expected to send on behalf of students.
What message would it send on behalf of rugby if Richards was to even be considered for such a high profile role in the game.
This method could let one computer send mail on behalf of another, as in the greeting card example.
But as first revealed by Forbes, most of the massive junk mail sent out on behalf of the Coalition was expensed by Chapins Help Hospitalized Veterans, with only the net proceeds booked by the Coalition.
