Reset Your Passcode Step 1 Enter Your User ID and Social Security Number To reset your Online Banking passcode, please verify your identity. All fields required., Login Help We're here to help Regain access to your M&T Online Banking account in just a few steps., Enroll in Online Banking Enroll your M&T accounts First, which account type are you looking to view online?, 4 Confirmation For help with your User ID, please call M&T Online Customer Service at 1-800-790-9130 (Mon-Fri 8am-9pm, Sat-Sun 9am-5pm ET). User ID If you have only Personal accounts, enter your Social Security Number. If you have Business accounts, please enter your Tax Identification Number. Social Security Number/ Tax Identification Number, Reset Your Online Banking Security Questions You have requested that we reset your security questions. All fields required. To create new security questions, please enter the code provided by M&T Online Customer Service., After you have enrolled in the M&T Online Banking services, you can use M&T Mobile to access some financial services and products and the functions from M&T Online Banking using a Mobile Device..