What will be my proof of ownership for Premyo Bonds? December 21, 2021 06:56 Updated An e-copy of the Confirmation of Sale (COS) will be downloadable from your online account on the listing date. Related articles Can I trade/sell the Premyo Bonds? How much is the broker’s fee for Premyo Bonds? How do I avail Premyo Bonds? How to participate in corporate bond issuances?