Nah.. you are safe.
Do you have any salary slips? If yes, furnish such slips. CIC want's to know that you are paid for your work, garner any documents to substantiate that point.
Along with reference letters, add any document which claims you are paid.
Some of us corporate employees couldn't even garner reference letter , as our employer didn't comply with our request. We are providing affidavits and other documents which add claim to our work experience. ComparTe to us, your case is less ambiguous