All I could find for you (which you may have read already):
""A proof of loss form is a formal document that you must complete in order to make a claim under your insurance policy. You can contact your adjuster to discuss the need to submit a proof of loss form, or your adjuster may provide you with a blank form as required by the Insurance Act.
As well, we may also send you a proof of loss form showing the amount approved by our appraiser, along with a copy of our appraisal. ""
Looks to me to be just another form to fill out in the claims process!