What will serve as my proof of investment? June 13, 2022 07:59 Updated For Bonds.PH users, an e-copy of the COS will be sent to their e-mail. Related articles What are the minimum and maximum amounts of Premyo Bonds that I can subscribe to on the App? List of Cash-In Payment Channels Is a UnionBank Current or Savings Account (“CASA”) required to be opened to invest in Premyo Bonds via the App? Who can purchase RTBs? Why is UnionBank the only bank supported by the Bonds.PH App?