Can someone reverse an ACH?

Could you elaborate on the feasibility of reversing an Automated Clearing House (ACH) transaction? I understand that ACH is a widely used electronic payment system that facilitates transfers between financial institutions, but what happens if a payment is made in error? Is it possible for the sender or recipient to request a reversal, and if so, what are the typical steps involved? What factors determine whether a reversal will be approved or denied? Additionally, are there any fees associated with reversing an ACH transaction, and if so, who would be responsible for paying them? Your insights would be greatly appreciated as I'm considering the implications of using ACH for my business transactions.