One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin. This is to notify the bank that my.(Relationship with deceased). The best way to avoid any issues with accessing the bank accounts of deceased family members is to have a clear and up-to-date estate plan in place. The documents needed are a death certificate, residential proof, bank passbook, etc. Title. LETTER OF ACKNOWLEDGEMENT TO NEXT OF KIN. A letter of instruction, or letter of intent, is a simple document that can take the guesswork and headache out of settling your estate.