An ACH Authorization Form is a document that grants permission to a business or financial institution to debit or credit a bank account for a specified amount of money. The form typically outlines the amount, frequency, and purpose of the transaction, and includes the account holder’s signature as authorization. There are two main types of ACH Authorization Forms: Recurring ACH Authorization Form and One-Time ACH Authorization Form. The Recurring ACH Authorization Form is used to authorize multiple payments from a bank account, such as for a subscription or loan repayment. The One-Time ACH Authorization Form is used to authorize a single payment or to make a one-time purchase. Both forms include the bank account holder’s name, account number, routing number, and signature, as well as the recipient’s name and contact information.