If you have questions about setting up or managing your trust account call the Trust Account Helpline at 602.340. Edit, sign, and share sample letter to close trust account online.No need to install software, just go to DocHub, and sign up instantly and for free. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. Then, select the Close Account(s) button and follow the instructions to complete the request. Lindsey Munyer, Partner at Keystone Law Group, discusses the rights of trust beneficiaries and the steps they can take to enforce them. Transfer accounts or assets to a Living Trust. The letter of last instruction is a letter detailing certain instructions not found in other estate planning documents. Here is a sample of one that has the necessary details to see if there is trustee breaches of fiduciary duties and say self dealing. Online: Use our online form to notify us about a customer's death.