I've found a link to the old CEC document checklist as the link below. #10 stated that the reference letter has to be stamped by company official seal. I know this is an old document checklist, but not much of it has been changed. Should we still follow the restriction of having to have it stamped? Thank you!
http://www.megatoronto.ca/forms/IMM5610E.pdf
http://www.megatoronto.ca/forms/IMM5610E.pdf