Just to add to Jalex23's reply....
Notarization is not required for India applications.
Also, as your mom has a history of returning after very short visits/overstaying/ordered to leave Canada, this could negatively impact your dad's TRV application.
You may want to consider not applying for your dad so quickly after your mom was ordered to leave Canada + when he applies, he must prove he has very strong ties to return to India + he must prove that your mom will not be accompanying him even though she has a valid TRV