Bmo bank of montreal will never ask you to divulge personal information such as passwords account numbers or challenge questions and answers by email telephone or fax. As at april 11 2005 about bmo mosaik mastercard bmo mosaik mastercard allows customers to build their own customized cards by choosing and paying for only the rewards features and interest rate plan they want. We encourage you to take a moment to learn how to protect your accounts against email fraud how to report fraudulent emails and read our 100 electronic banking guarantee.