Thank you Dr. Hasib, what you have mentioned is quite right.
I would like to add that I didn't have to give them a separate Internship certificate. Just one certificate that mentioned that I worked as an Internship physician from __ to___ & that my monthly salary had been ___ for that year.
I also added a paper with the duties of Internship physician in the educational hospital I have been in. The paper was a general duty one from the hospital, so I had them sign & stamp it by the hospital's seal to show that it's an official paper.
In short, you have to supply all the requirements they ask for in a work experience.
Dear casayed,Send me your email in a personal message & I'll try to send to you a copy from the work experience letter I have sent..
You should also try to show how similar your duties then were with the duties in the Canadian National Occupational Classification 3112 Doctor, Intern category.
Dear jbanny, I hope you got an answer to your enquiry
All the best,
Basmalahh