A letter of last instruction is a document that outlines funeral planning processes and arrangements. Notify Bank of America.We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. How do I file a Spousal Property petition? This page tells you about: What is probate? Is probate necessary? A letter of last instruction is a document that allows you to organize and give your family instructions pertaining to your final wishes. The process of claiming a bank account after death varies based on a number of factors. Here's how to claim a deceased person's bank accounts. Upon a City of San José member's death, certain benefits may be payable to a surviving spouse, domestic partner, or designated beneficiaries.