Institutions such as probate courts, banks, and insurance companies will require certified copies of a death certificate. Typically, the funeral home can arrange to get these documents for you. Or, you can contact your state's office of vital statistics.
The 360 Degrees of Financial Literacy Web site offers general information for managing personal finances and does not recommend specific financial actions. For financial advice tailored to your situation, please contact an expert such as a CPA or a personal financial advisor.