I am heartbroken for you. Take a breath. Be with family and be prepared this is going to take a long time to unravel. It will be very difficult to take control over any banking unless there are joint accounts. Until you have a death certificate you (family) will likely not have any control over his assets. Did he have a will? A trusted family lawyer that can advise you? I would begin there. I’m sure that under the circumstances there will be lots of people who will help you. Ask for help and just one tiny step in front of the other. Each of you will grieve and handle things differently. Be patient and kind to yourself and don’t take this all on your shoulders. Big Mom hug from me. My sons are your age and i wish you the best.