You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs. Social Security and Medicare.You may need to contact lenders and creditors to notify them the person is deceased and the accounts need to be closed, even if the account has a zero balance. A freeze can prevent anyone from opening up new credit cards or other accounts using the name and Social Security number of the deceased. Online: Use our online form to notify us about a customer's death. Question: My mother passed away. She does have a will and I was nominated as the executer and trustee. Mortgages and auto loans are treated differently than credit card debt and student loans. The credit bureaus will need a certified copy of your death certificate. Death, such as a personal physician or credit card company.