But in saskachewan official website it is mentioned the following :No. Affidavit will not work at all. Only on Letter head.
If they are related to your intended ocuupation then must present separately. Only then will the points get.
Documents must include letters of reference from the supervisor or Human Resources Officer printed on company letterhead or the applicant’s official work book or other official government documents.
So, affifidivat is a satutatory government document.