"assign on behalf" is a correct phrase in English and can be used in both spoken and written contexts.
Example: The judge assigned the case on behalf of both parties.
Then, divide class in half, assigning one side to argue on behalf of social promotion and the other in defense of retention.
We need new global institutions that can assign and enforce property rights on behalf of the global community.
One night, reporters assigned to monitor his movements on behalf of the media were told he would be staying at home, only to later discover that he had nipped out to a steakhouse, where he promised to lower taxes and received a standing ovation.
However Schrems' lawyers came up with the idea of grouping claims by "assigning" them to one person who can sue on behalf of everyone else.
I was a White House aide assigned to assist with the bill on behalf of President Clinton, and I watched as it was defeated forty-nine to fifty.
The five-member "consultative group" helps select the experts who are assigned to examine human rights issues on behalf of the Council.
The Japan Meteorological Agency's RSMC Tokyo — Typhoon Center assigns international names to tropical cyclones on behalf of the World Meteorological Organization's Typhoon Committee, should they be judged to have 10-minute sustained windspeeds of 65 km/h, (40 mph).
As part of its duty as a Regional Specialized Meteorological Centre (RSMC), the JMA's Typhoon Center in Tokyo assigns international names to tropical cyclones on behalf of the World Meteorological Organization's Typhoon Committee, should they be judged to have 10-minute sustained winds of 65 km/h (40 mph).
The actor Tony Robinson was assigned the role of asking questions and summing up on behalf of the non-academic viewer.
We are depending on you to assign appropriate value to our lives, swift and fair justice on behalf of lives lost, and the foresight to allow us to be empowered with the protection of ourselves in the future.
Also called "Promoters of the Faith," they were canon lawyers assigned the single task of challenging the representations and arguments made on behalf of each candidate.
