A bank letter is an official document from your bank that provides important information about your business' official bank account. Summit Bank provides traditional banking services and offers a full range of financial products for individuals, businesses, and professionals.46, and ABA routing number. Complete this form with your Name, Employee Identification Number, Work Address and Work Phone Number. Go to MyOCC, see Banking Information. You must enter your bank information. Official website of Mechanics Bank. Find Chase branch and ATM locations - East 14th Oakland. Get location hours, directions, and available banking services. Oakland, CA 94612-2908. 1.800.545.0232. 1.510.873.5805.