This involves filling in the required information your name, bank account, authorization for the transfer of funds, etc. This blog covers essential ACH authorization form requirements, including how to complete them correctly for smooth payment processes.We will cover how to properly fill out an ACH form and how to submit the additional information required. Up to thirty days' written notice may be required. How Do I Obtain an ACH Authorization Form? , authorize Kings Community Action. An ACH authorization form is a legallyrequired agreement that is required in order to execute an ACH payment, which is a type of electronic funds transfer. The bank letter must include ABA number (routing or transit number), bank account number, and type of account (checking or savings).