A letter of intent is frequently recommended for parents of children with disabilities to share information for when the parent dies. A letter of instruction can be an enormous resource for executors looking to fulfill your wishes."A letter of last instruction is a document that outlines funeral planning processes and arrangements. This set provides coverage of every aspect of probate law and estate and trust administration in Texas. It includes sample forms and letters. Writing a letter of instruction can help expedite the estate planning process. In this section, you should outline how you want your assets to be distributed after your death. This document gives your Successor, Trustee. Or Executor specific and detailed instructions regarding your wishes after you die or become incapacitated. To retrieve the funds after the account owner's death, the beneficiary will need to provide the bank with a copy of the death certificate.