You can certify online through the Michigan Web Account Manager (MiWAM) anytime during the day or night, Monday through Saturday of your reporting week. You can establish a MiWAM account at www.michigan.gov/uia If you want to certify by telephone, you may call MARVIN anytime Monday through Saturday, 8 a.m. to 7 p.m. during your scheduled week. You are no longer required to call MARIN during a specific day and time based off the last two digits of your social security number.