Not all forms, according to Checklist IMM5771:
IMM1244 : only 1 by Sponsor, Co-Sponsor, principal Applicant
IMM5768 : only 1 by Sponsor, Co-Sponsor
IMM5409 : only 1 by Sponsor, Co-Sponsor
IMM0008 : Only 1 by principal Applicant, Second Copy only when Grand Parents are included, Again only one...