This letter is to request that account number. Be closed and a check for the remaining balance be sent the address listed below.To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. How Do Bank Closure Letters Work? This letter is to inform you I am closing my accounts at your bank. Trustees are often required to open a bank account in the name of the trust. This bank account can hold assets while the trust is administered. The term refers to the distribution of the estate's final assets, which typically means that the Executor has run out of things to do.