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!This letter authorizes the State Comptroller to process state warrants made payable to (Payee) representing payment for. Bank instruction letter. For applicants that don't have bank accounts in the Far East. Read and follow all instructions completely. Please type or laser-print all forms. The prescribed forms are available in fill-in-the-blank format on this web site at UCC Forms. Bank letterhead; Account number; Routing number; Business name.