Automatic Check Handling
From Innopaydia
ACH is a form of epayment or electronic payment. There are two ways payments can be transferred: (1) by wire transfer, or (2) through an automated clearinghouse. Wire transfer is an e-payment system that is designed to handle high-dollar, time-crucial payments, usually between large banks. ACH is designed to be an e-check or electronic check. Unlike the wire transfer, it is usually used to process higher volumes or small-dollar payments for settlement issues within 1 to 2 business days. All ACH transactions are settled in a manner similar to the way checks are settled: The clearinghouse takes all ACH files received daily from its member banks, sorts them by the originating bank (the bank where the check was cashed or deposited) and the paying bank (the bank against which the check was drawn), totals the accounts, and credits or debits appropriate accounts accordingly.