AAT - Password Reminder Please verify/enter your email address and enter the answer to your authentication question on the form below. If you have any problems, please send an email message to: AATRegistration@bmo.com.   Email Address:   What is your mother's maiden name? What is the name of the city in which you were born? What is the name of your pet? What are the last four digits of your Social Insurance Number? What are the first five characters/digits of your driver's license?