Omolola,
If you are sure that you submitted the application on his behalf, then yes submit the CSE as the representative. However, if you submitted separately, then each of you should submit a CSE.
As a reminder, to be a representative is NOT the same as giving authorization to someone else to receive information about the application. Those are two different things. So be sure before you submit the CSE.
"Online Temporary Residence - Work Permit"
Cheers!
thanks I feel the IMM5476 form, I summit his application undermine CIC. we did a family application