It can be as simple as "we are closing your account as of X date. How Do Bank Closure Letters Work?To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. Adhere to the instructions below to fill out Account Closure Request Form online easily and quickly. Make the most of DocHub, the most straightforward editor. Edit, sign, and share letter of instruction to financial institution online. Get the resources you need to help navigate someone else's financial affairs. Notify the bank of your intention to close the account and provide a certified copy of the power of attorney document. When one party dies, the survivor owns all remaining assets in the account. Letter of instruction.