Toronto Montréal Calgary Ottawa Vancouver New York | | January 10, 2020 The Bank of Nova Scotia 44 King Street West Scotia Plaza, 24th Floor Toronto, Ontario M5H 1H1 Dear Sirs/Mesdames: The Bank of Nova Scotia – U.S.$1,000,000,000 1.950% Senior Notes due 2023 (Bail-inable notes) and U.S.$1,250,000,000 2.200% Senior Notes due 2025 (Bail-inable notes) We have acted as Canadian counsel to The Bank of Nova Scotia (the “Bank”) in connection with the issue and sale today (the “Offering”) by the Bank of U.S.$1,000,000,000 aggregate principal amount of its 1.950% Senior Notes due 2023 (Bail-inable notes) (the “2023 Notes”) and U.S.$1,250,000,000 aggregate principal amount of its 2.200% Senior Notes due 2025 (Bail-inable notes) (the “2025 Notes” and, together with the 2023 Notes, the “Notes”) pursuant to an underwriting agreement dated January 7, 2020 (the “Underwriting Agreement”) among the Bank and Scotia Capital (USA) Inc., Morgan Stanley & Co. LLC, Citigroup Global Markets Inc., Goldman Sachs & Co. LLC and UBS Securities LLC, as Representatives of the several Underwriters named therein (collectively, the “Underwriters”). The Notes are issuable under and pursuant to a senior debt indenture dated as of January 22, 2010 (the “BaseIndenture”) among the Bank, Computershare Trust Company, N.A., as U.S. trustee (the “U.S. Trustee”), and Computershare Trust Company of Canada, as Canadian trustee (the “Canadian Trustee” and, together with the U.S. Trustee, the “Trustees”), as amended and supplemented by a first supplemental indenture, dated as of November 30, 2018 (the “Supplemental Indenture” and, together with the Base Indenture, the “Indenture”). All capitalized terms used in this opinion letter shall, unless otherwise defined in this opinion letter, have the meanings ascribed to them in the Underwriting Agreement. As Canadian counsel to the Bank, we have examined originals or copies, certified or otherwise authenticated to our satisfaction, of the following: 1. the preliminary prospectus supplement dated January 7, 2020 (the “Preliminary Prospectus Supplement”), the final prospectus supplement dated January 7, 2020 (the “Final Prospectus Supplement”) and the base prospectus dated December 26, 2018 (the “Base Prospectus” and together with the Preliminary Prospectus Supplement and the Final Prospectus Supplement, the “Prospectus”); |