One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin. Last Name of Next of Kin,.Discover the precise steps to secure Letters of Testamentary in California. Our comprehensive guide makes the process straightforward and hassle-free. You will also need the names and addresses of next of kin. File an application with the probate court to be appointed administrator. No. You will need to administer deceased father's estate to cash check. Your attorney can assist with researching whether probate already opened.