Some employers - for instance, government agencies - will not allow a reference letter on official letterhead because it would imply official support for the employee.fbf2006 said:The letter should also include a business card or at least be on company letterhead that includes how to reach the person that wrote it so information can be verified if needed.
This is correct. Don't get caught up in semantics. You need to prove to immigration where you worked and what your responsibilities were.fbf2006 said:I don't think whether you call it a COE or LOR matters. For all we know, it could be the same thing. The question is, what detail does the COE you have include? Does it include the details requested by CIC? The details CIC wants is included in the application instructions. If it has that info, then you should be fine.