Quickly learn what a Letter of Instruction is and how to write one (2024 updated). Plus, grab the free template so you can take action!These trusts are called testamentary trusts and are usually irrevocable. A letter of instruction is a document that guides a designated individual or entity on how to carry out specific actions or wishes after the author's demise. In this guide, we'll discuss the process of creating a Trust-Based Estate Plan and how to transfer bank accounts to your Trust. Make a living trust with this living trust checklist and learn other valuable tips on creating a California living trust on your own. Most Estates only need to open a basic checking account so the executor administrator or trustee can take care of all of the estate's expenses. Learn how to put your home in a trust. Contact our RJS LAW estate planning team for more information (619) 595-1655. How Do You Get a Letter of Testamentary Without a Will?