Call each card issuer and ask to speak with "Deceased Account Services" or the "Estate Unit. However, to officially close the account, it's smart to follow up in writing.Sample Letter – Asking for a debt write-off when someone is deceased. Most companies will need proof that the person has passed away, including a death certificate. Call 911 right away if there is an unexpected death in your home. The medical team will help you figure out the next steps. You will need to provide a certified copy of the death certificate to close the account. Step 3: Figure out who is legally responsible for any credit card debt. The credit card company may request a copy of the death certificate or any paperwork relating to the estate. We can help you with everything from completing forms and closing accounts, to handling the release of money from the estate.