Explanation letter for Canadian Visa

Hello everyone,
I am going to write an explanation letter for the Canadian visa office, explaining why I can't provide the "reference letter" and "letter from current employer" documents.

Can anyone please check the following and see if it is OK?
Thanks in advance

To whom it may concern

My name is xxxxxx; I received my PhD degree from xxxx. During my PhD, I published fourteen papers in top journals and conference proceedings.
I have a postdoctoral research fellow offer from xxxxxx, and therefore I am applying for a work permit. However, during the past year I have mainly been teaching in the xxxx University. For "letter from current employer", they only provide a fixed type of document, which I have uploaded its translation. Also I have not a direct supervisor, and it is not possible to get the reference letter from them. However, I have provided a reference letter from my PhD supervisor that I hope will demonstrate my quality for such research position.

I don't know about the Canadian visa process but I doubt that the Canadian government needs a well-written essay to explain special circumstances.

As long as you explain the problem, you should be fine :)

Try looking online to see if people had similar problems with Canadian Visas

Hope that helps and good luck!