A Proof of Death Certificate is necessary before anything can be done. This document is provided by the Funeral Director. R. S. Kane provides 10 copies as most agencies require an original certificate and not a photocopy. You can ask them to copy the original for their records, and return the original.
If assets exist in other countries, then you will need to apply for a Certified Statement of Death. This is a government issued document which will be accepted outside of Canada. There is an 8 -12 week waiting time for this document, and there is a nominal cost for each copy.